Installation & Operating Instructions - Absolute Koi
Contents
1. T W ity system x o Pump Isolation Valve y Isolation Valve Fig 13 Nexus Eazy Rev 1 03 page 4 YC EVOLUTION GQua The length of this depends on the distance between the air pump and the Nexus 4 Ensure that the air pump is sited well above water level to prevent water siphoning back from the filter into the pump due to power cuts or maintenance shut downs 5 Pipe work from the unit s waste valves to the intended discharge point This can be rigid pipe work to a simple flexible hose 6 A PVC reducer to connect your circulating oump or pipe to the rubber connector sup plied with your Nexus the size of which will depend on your choice of pipe work to and from the pond itself 7 Care must be taken when connecting the waste valves fig 14 for the suggested method to your chosen point of dis charge valve Fig 14 Pump Fed Installation Section 200 300 Important Essential First Action In any pump fed installation the first step is to make sure that the water level weir plate standpipe is in place Fig 15 or Fig 16 Exit plate Safety overflow Max Water level T Chamber A Chamber D Gi la Chamber C Ft Chamber B iL NM Fig 15 THIS MUST BE DONE BEFO2. charges above the surface of the pond If the grav ity return pipe discharges below the surface of the pond Please allow 50 mm from the exit of the Nexus to the surface of the pond Exit plate Safety overflow Max Water level I Chamber A Chamber D Chamber B gt f i Fig 20 gravity version Nexus Eazy Rev 1 03 page 5 YC EVOLUTION AQUA The gravity return pipe work from the exit point of the Nexus to the pond needs to be a minimum of 75 mm external diameter and should have no restrictions Great care should be taken to ensure that no air locks are created within the gravity re turn pipe work The pipe work from the pond pump to the inlet of the Nexus will need to be connected to the rubber 50 mm connecting adapter that is fit ted to the inlet of the Nexus A PVC reducer may be required the size of which depends on the size of the pipe you have chosen to connect the pump to the Nexus The 75 mm minimum gravity return pipe work will need to be connected to the rubber adapter on the exit point of the Nexus This pipe is then extended returned to the pond or waterfall as required Gravity Fed Installation Section 200 300 Once you have positioned the Nexus please connect the pipe work in accordance with your require
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4. means to grow whilst the Kaldnes media pro vides maximum surface area for the bacteria to colonise and produce bio film It is this process which removes harmful ammonia and nitrite from the water As the Kaldnes media chaotically circulates within the bio tank it causes old dead bacteria bio film on the outside to be removed making space for new younger heavier feed ing bacteria bio film to colonise Within the wheel is a protected surface which enables colonies of bacteria to naturally follow their life cycle maturing and dying in turn fuelling the latter stages of nitrification conversion proc ess It also assists in the breakdown of any small particles passing through from the mechanical stage Therefore the Kaldnes media maintains both a young biofilm amp a maturing bio film providing a more consistent filter per formance whilst improving water quality encouraging healthier Koi and aiding in reducing green water and blanket weed Due to chaotic movement of Kaldnes K media the process is self cleaning and requires no main tenance This allows the filter to reach optimum effective ness without the disturbance of periodic maintenance avoiding unnecessary loss of bacteria within the filter preventing high levels of ammonia and nitrite within the water The other major benefit of Kaldnes K1 media is the huge active surface area available for the bacteria to grow on compared to other types of media This feature allows for
5. on the loading of the pond The longer the filter is left undisturbed the finer the filtration will become How ever the filter must be purged regularly to avoid circu lation pump starvation on a gravity system or chamber overflow on a pump fed system Cleaning Gravity Procedure 1 Stop the circulation pump 2 Wait a short a period of time so as to allow the water levels within the Nexus to stabilise Nexus Eazy Rev 1 03 page 6 YC EVOLUTION aq aA 3 Close off the feed to the biological chamber by inserting the isolation pipe into the centre of the Eazy ensuring that the rubber flange engages within the Nexus centre spigot Fig 23 4 Close the inlet to the Nexus by using the inlet slide plate sup plied with your Nexus You should now have isolated your Eazy from the system Fig 24 Fig 23 5 Open the air valve until the Kaldnes in the Eazy is boil ing of one minute open the valve to waste drain from the central Nexus chamber 7 Once central chamber has drained close waste valve 8 Remove the Isolation pipe 9 Close the airvalve 10 Remove the Nexus inlet slide plate allowing the nexus to refill 11 Restart the circulation pump Cleaning Pump Procedure 1 Close single union ball valve on inlet pressure line supplied Fig 26 2 Close off the feed to the biological chamber by inserting the Isolation pipe into the centre of the Eazy ensuring that the rubber flange e
6. smaller filter design e g the Nexus whilst provid ing increased biological efficiency How it all works Maturing the Kaldnes bio media is important The maturing process needs monitoring closely to ensure that levels of pH ammonia and nitrite are within acceptable parameters for your fish Usually within 2 10 weeks the fil ter will be effective and the parameters should be within Nexus Eazy Rev 1 03 page acceptable levels depending on temperature and stocking levels Bacteria grows faster in warm water E g a pond at 5 Celsius will have a very low bacteria count Ly and a slow growth rate Therefore H temperature Is important in reduc ing the time for a bacteria colony to develop Bacteria require food to live otherwise it will starve The food for bacteria is liquid and solid waste produced by fish Therefore higher stocking levels will provide more nu trients for the bacteria and help it to establish a colony The liquid waste is called ammonia and is the food for the bacteria Solid waste is broken down to ammonia but a Koi keeper is better off removing the solid waste through settlement The fitting of an Answer 325 filter into your Nexus 200 filter will improve this dramatically The ammonia reducing bacteria nitroso monas pro duce an end product called nitrite which is again potentially toxic to fish This is controlled through estab lishing a large nitrobacter population to convert nitrite to the end pro
7. Fed We recommend that you read all the following sec tions then select the appropriate installation sec tion e Preparation e Installation Equipment e Pump Fed installation Section Preparation A base level solid ground is required It should be a minimum of 1 2m x 1 0m to allow easy access to valves and for maintenance purposes Important The Nexus filter needs to be equally supported on the three pairs of feet which are located under the vessel This is to prevent possible distortion when it is full of water The best op tion for this would be a level 100 mm thick concrete Reducer If Required olinth Al ji Ballvalve supplied though deck ing paving slabs or gravel would be suf ficient as long as the Nexus sits level and is not allowed to deflect under the weight of the water Installation Equipment required or recommended lx Pond Pump with a maximum actual flow rate of no more than your Nexus model allows see pages 2 or 3 for specs 2 Air Pump to power the kaldnes K1 Moving Bed see specifications for size of pump required on page 6 3 Length of hose or braided pipe 10 mm in ner diameter to connect the air pump to the already positioned supplied air ring Alternative i aan ines a Return to Pond Return to Pond your Koi Via Waterfall Hl Gravity Fed lt lan Systems In fig 13 you can a see a typical a H set up of a grav PurgeValve
8. NEXUSE FILTRATION system AZY 200 300 F E E I Fe is a i i a eo oa zy g na i E i g ate im it i al i ii i i none Mia ti L oo KEI AL St r L it i T 1 r J a al th ar Le r aL n a IRES oy pi i f 1 l Installation amp Operating Instructions Note Do not attempt to operate this unit before reading the manual thoroughly Manufactured by Evolution Aqua Ltd Evolution House Kellett Close Wigan WN5 OLP Tel 44 0 1942 216554 Fax 44 0 1942 216562 A EVOLUTION Web www evolutionaqua com AQUA E mail info evolutionaqua com YC EVOLUTION Qqua Thank you for purchasing your Nexus Eazy filter We are sure you will be delighted with its perform ance You should have already decided whether your filter system will be pump or gravity fed Please go fo the relevant section and read thoroughly before installation The Nexus Eazy filtration unit has been designed on the principles of minimum maintenance high performance and a compact foot print This design delivers optimum water quality by using the Kaldnes Moving Bed process Basic Operation Nexus This section briefly explains the basic operation of the Nexus filtration system Water is delivered to the inlet of the filter and enters chamber A see fig 15 This chamber is the main mechanical stage of the filter All of the solids and debris ar
9. RE ANY ADDITIONAL INSTAL LATION WORK IS CARRIED OUT Figure 12 illustrates a typical pump fed installation When selecting the position of your Nexus Eazy filter carefully consider the following factors Fig 19 Fig 18 On the 300 the level is maintained with the exit standpipe in the outlet Fig 16 An overflow grill is cut out of the central chamber wall for added orotection Fig 17 In the 200 a weir plate Fig 18 sets the Nexus water level and the overflow is built into the wall between the two chambers with a section moulded at a lower height Fig 19 NB NON UK CUSTOMERS PLEASE NOTE if you are pump fed you will receive the weir 200 and stand pipe 300 loose and they need to be inserted as shown The weir is simply dropped ito place To insert the pipe the top two bolts and locknuts are removed from the stainless steel outlet plate Gently pull the plate forward and firmly push the standpipe in place Replace the nuts and washer IF THIS PIPE IS NOT FITTED THE WATER LEVEL IN THE BIOLOGICAL CHAMBER WILL BE TOO LOW FOR THE FULL USE OF THE BIO MEDIA AND THE EAZY The unit can be any height above the surface water level allowing adequate gravity return to the pond subject to the maximum performance of your cho sen pump However care needs to be taken that the top of the Nexus is at least 500 mm higher than the discharge point of the gravity return pipe into the pond assuming that the gravity return pipe dis
10. comes fitted Fig 3 Stainless steel centre pipe comes fitted Fig 4 Kaldnes K1 30 litres for the Eazy 200 45 litres Fig 5 for the Eazy 300 Nexus isolation pipe used during cleaning Fig 4 Fig 5 Fig 11 Nexus Eazy Rev 1 03 page 3 AA EVOLUTION AQUA Fig 6 Kaldnes K1 for bio chamber Nexus 200 50 litres Nexus 300 100 litres Fig 7 Inlet plate Gravity fed only Fig 8 Weir plate comes fitted Nexus 200 oump fed only Fig Standpipe Nexus 300 pump fed only Fig 10 1 5 inch ball valve for pressure inlet pump fed only Fig 11 Two rubber connecting adapters fitted Pump Fed Systems The nexus filtration system can be used in two ways pump or gravity fed fig 12 oump fed Return to Redcar Pond SS If Required Pond Pump Raised off ____ Bottom Min 12 7 N i a 7 N gn a oN Dn m TO T Ta 1 W w Ye he Te hs n w w he te To Ys w A is ie 1 MO M M M ior he a i he Ms ts he in ts he he ts in wO W y aa aa W O hy hh a T ps gA 7 My h w h A a Me w i hy Thy hy i oy Ta he he 1 i Fig 12 Important you must raise your pump off the pond floor It is incorrect practice to place a pond pump on the base of any pond as failure in the filtera tion system Pipe work or connectors could lead to complete drainage of the pond Therefore leave a sufficient gap min 12 for Installation Section Pump Gravity
11. duct nitrate The effect of nitrate is less harmful than both ammonia and nitrite However if nitrate levels are allowed to rise above 50 mg L pond keepers may start to experience green water amp blanket weed The Kaldnes Moving Bed Process is very useful in controlling these levels as it has the highest removal rate of any submerged media on the market Nexus Eazy Guarantee This product comes with a 2 year warranty which is valid from date of purchase Proof of purchase will be required Any unauthorised repairs modifications or alterations to this unit will invalidate the warranty Evolution Aqua accepts no responsibility or liability due to accident improper installation or misuse Liability is limited to replacement of the defective parts This guarantee is not transferable It does not affect your statuary rights If there is a warranty issue please contact Evolution Aqua s Technical Service department Claims for transport damage shall only be recog nized if the damage is reported within 24 hours after delivery and confirmed by the carrier Evolution Aqua reserve the right to change this product specification without prior notice All products designed to ISO 9001 and manufactured to ISO 9000 Patent Information GB2 293333B WO 00 61258 PCT GB01 05533 PCT GB01 05549 0750591 0575314 5 543 039 5 458 779 6126829 689246 2119893 3183406 Distributed by Evolution Aqua Ltd Evolution House Kelle
12. e stopped in chamber A and are sumMped to waste via a 1 5 inch ball valve provided The water Nexus Eazy Specifications and Flow Rates Follow your relevant section carefully and your filter will perform correctly providing a perfect environment for your Koi One of the factors that can have a sig nificant influence on the general parameters of our ponds is turn over rate This is the time that it takes for the total volume of the pond to pass through the filter system once On Nexus ponds a turn over of every 2 to 3 hours is found to be best Nexus Eazy 200 Max flow rate Max pond size Kaldnes K1 425 10 000 litres hr 2 200 UK or 2 640 US gallons hr 18 000 litres hr 4 000 UK or 4 800 US gallons 50 litres for bio stage max 150 litres possible 30 litres for Eazy max 30 litres possible 766 5 189 then passes to chamber B con taining the kaldnes Moving Bed where the biological filtration takes place The air ring at the base of Chamber B constantly agitates the media Chambers C amp D are empty and allow the clean water to return to the pond 1116 3 Basic Operation Eazy The Eazy is a stainless steel ves sel containing a volume of static K1 media which is located within the centre chamber of the Nexus Water enters the centre chamber and then enters the Eazy via slots in the lower half of the unit This results in a downward flow causing many of the larger solids to se
13. ments Recommendations The rubber 110 mm 4 boot supplied will go onto the inlet point connecting the Nexus to the pond after the recommended isolating valve has been fitted between the bottom drain and your Nexus The other rubber boot supplied will then fit onto the outlet side of the Nexus to connect the outlet to your circulating pump A PVC adapter reducer may be required Air Pump Installation Pump Gravity Now that you have your Nexus installed we need to get the Kaldnes installed and the airoump attached to circulate it This will be circulated permanently in the outer biological chamber when your system Is running and for cleaning only in the central cham ber when maintaining the Eazy Fig 21 Your choice of air pump will depend on how much Kaldnes you have in your biological chamber see table The Fig 21 size of air pump required will depend on the amount of KI media used Air Pump Size Capacity of K1 media 50 litres of K1 media 100 litres of K1 media 100 150 litres of K1 media 15 20 litres per min AO litres per min 80 litres per min The air pump is connected using a pipe 10 mm inner diameter to the air ring inlet which is positioned on the outside of the Nexus It is recommended to position the air bump higher than the surface water level in the Nexus to prevent water flowing back into the air pump when it is switched off see fig 22 r S Fig 22 Getting Started Empty
14. ngages within the Nexus cen tre spigot 3 Re open inlet valve until the water level within the Nexus central chamber is level with the overflow close inlet valve It is essential that this water level is maintained to allow efficient cleaning 4 Switch off the pond pump 5 Open the air valve until the Kaldnes in the Eazy is boiling 6 After the Eazy has been boiling for a minimum of one minute open the valve to waste drain from the central Nexus chamber 7 Once central chamber has drained close waste valve Fig 26 8 Remove the Isolation pipe 9 Close the airvalve 10 Openinlet valve 11 Restart the pond pump Kaldnes Moving Bed Process Kaldnes Moving Bed process has been scientifically tried and tested in fish farming and waste treatment for over 10 years initia tll O Illustrated above are the different stages of maturity that will be experience during the first few months Developed by Professor Halvard dergard at Trondheim University of Science and Technology the Kaldnes Moving Bed bio film process has been designed specifically to create the most effective environment for the nitrification process to take place The media is engineered in a wheel shape and is slightly positively buoyant allowing a small amount of water flow created by adding air to the process to circulate the media throughout the vessel Oxygen and food ammonia and nitrite gives the bac teria the
15. tt Close Wigan WN5 OLP United Kingdom UK Sales 44 0 1942 219 898 Technical 44 0 1942 219872 emal info evolutionaqua com Web www evolutfionaqua com Europe Germany Unique Koi Rauhe Strausse 36 D46459 Rees Germany Sales 49 0 2851 58950 Fax 49 0 2851 589525 emal info uniquekoi de Web www uniquekoi de emal infodevichland evolutionaqua com Netherlands Quality Totaal Bohrweg 22 24 3208 KR Spikenisse Netherands Sales 31 0 181 628612 Fax 31 0 181 611632 emal infoQqualitytotaal nl Web www qualitytotaal nl emal infobenelux evolutionaqua com USA amp Canada Pond Wise Inc 429 Shields Rd Huntsvile Alabama 35811 USA Sales 1 0 2568590123 Fax 1 0 2568590110 emal oondwse hiwaay net Web www oondwse com emal infousa evolutionaqua com Asia Max Koi Fam 251 Neo Tiew Cresent Singapore 7 Singapore Sales 65 0 6862 6343 Fax 65 0 6862 6262 emal info maxkoifarm sg Web www makoifarm sg emal infoasa evolutionaqua com Nexus Eazy Rev 1 03 Australia Aussie Koi PO BOX 663 Bulimba 4171 Quensand Australia Sales 61 0 417 601 651 Fax 61 0 73399 8892 emal tim aussiekoi com Web www aussiekoi com emal infoasia evolutionaqua com South Africa Cape Koi Aquarium PO BOX 1312 Brackenfel 7561 South Africa Sales 27 0 219889724 Fax 27 0 219889595 emal Wiam whr coza Web emal infosouthafica evolutionaqua com page
16. ttle out prior to entering the Eazy The size of the slots will not allow large mechanical waste to enter the cylinder thus acting as a first stage mechanical filtration The water then passes through the static K1 media utilising up and side flow and this process causes the fine solids to become entrapped The mechanically clean water then passes to the outside chamber of the Nexus where the Kaldnes mov ing bed is located for biological treatment prior to being returned to the pond 634 3 531 9 1250 I max water level 840 59 7 742 324 7 Nexus Eazy Rev 1 03 page 2 1070 AA EVOLUTION QQua Nexus Eazy 300 Max flow rate 15 000 litres hr 3 300 UK or 3 900 US gallons hr Max pond size 34 000 litres hr 7 500 UK or 9 000 US gallons Kaldnes K1 100 litres for bio stage max 200 litres possible 45 litres for Eazy max 45 litres possible OUTLET 1323 157 M a lt ists 1010 P54 i NA S A OUTLET NOMINAL PIPE INLET NOMINAL PIPE BORE 100mm 100mm On opening your Nexus you will find the following Fig l Nexus 200 or 300 main body Fig 2 Stainless steel Eazy vessel
17. your correct amount of K1 into the empty outer biological stage Fill your Eazy with its appro priate amount Fig 4 Once the nexus is plumbed in the pump is fitted and the media is in it is ready to be started As with anything maintenance is an individual and personal thing Cleaning and main taining the Nexus will depend on flow rate feed stocking blankert weed etc A summer pond after a blanket weed treatment will obviously need more care than a December unheated pond with no food fed Be aware that any movement of the Eazy K1 will disturb fines back into the pond The biome dia k1 is zero maintenance The cleaning regimes for both pump and gravity installations are listed below When all the connections have been made the Nexus filter may be filled from the pond and the air pump switched on The K1 media will not attain neutral buoyancy completely to begin with Most of the media floats which is normal In existing mature pond water the media may start to circulate fully in as lit tle as 2 3 hours In a newly filled and stocked pond this full movement may take up to a week to occur Either way a constant and even circulation should be achieved throughout the chamber For more information about this please read the Kaldnes K media section System running and maintenance To achieve optimum water clarity we recommend that the Eazy be air backwashed and purged on a regular basis The frequency of cleaning will deoend
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