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19-06-2020, 05:15 PM #1
Bottom Drain to Eazy Pod 4" pipe or is 3" pipe work ok?
Evolution Aqua LtdOn a Eazy Pod gravity feed pond, where it is used as the only filtration system, a total pond volume turnover of every 1 to 2 hours is required. Therefore if you have a 10,000 litre Koi pond, a minimum rate of 5,000 litres per hour is needed giving a 2 hour turnover, although you could also run at 10,000 litres per hour giving a turnover rate of once per hour.
The lower the flow rate you use, the better the performance will be as long as it does not result in a turnover rate of more than two hours. The gravity return pipework from the exit point of the Eazy Pod to the pond needs to be a minimum of 3 inches (90 mm), 4 (110 mm) for flow rates over 7,500 litres per hour
If my pond is 4500 litres therefore as I understand it, the turnover flow needs to be 4500 litres per 1 to 2 hours minimum. I always presumed 4 or 110 mm pipes for a gravity feed Eazy pod system but as my koi pond is on the smaller end of things would it not be OK to just use 3 pipe from the bottom drain to the Eazy pod, this would also be very cost effective as ball valves & pressure pipework are considerably cheaper when you go to 3"? Is 3 commonly used or would I be prudent to just go with 4? Those of you that have an Eazy Pod do you or would you use 3"?
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19-06-2020, 05:32 PM #2
3 inch would give you ample flow.
not sure if an easypod will be sufficient bio filtration on its own, I suppose it depends on the load, something to keep in mind anyway, Is how you could add extra bio to the system because you will probably need it at some point.
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19-06-2020, 06:01 PM #3
Last edited by Slays; 19-06-2020 at 06:14 PM.
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19-06-2020, 08:02 PM #4
yes we all know what the manufacturer states , lol.
you could just return your water from the easypod over a shower, dead easy to make something, I just filled a half size blue barrel with alfa grog and returned water through it, works as good as any expensive shower imo, and for peanuts.
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19-06-2020, 09:14 PM #5
I set up a gravity fed easy pod on my 1500l quarantine tank. For the extra bio I added a slimline waterbutt to work as a moving bed with 50l of k1. Probably cost about £100 for materials, butt, k1, air stone, piping and valves. Still in the process of maturing but I hope it will do as a grow on unit when the current fish are out of quarantine.
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19-06-2020, 10:28 PM #6
I used 4” pressure pipe from the bottom drain and have not had any issues with my eazypod. The shop who I did not get the pod from recommended this size and as I was not that bothered regarding cost I just did as advised and used an aerated drain cover. I always like to think ahead about long term and get the best I can afford at the time. If you can afford 4” then I would go with that however if you need to make savings go for 3”.
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19-06-2020, 11:39 PM #7
I guess... I have the funds in the bank to buy whichever but I am concerned Koi keeping has become a symptom of male mid life crisis, where its become all about having the absolute best even if its not necessary, who has the biggest, who has the best, who can pee highest etc. lol & everyone going for the most expensive option to be safe when it really is not necessary, I not interested in competing to have the best I just want to enjoy the hobby & if 3" waste pipe is as suitable as the most expensive 4" pressure pipe then give me the lesser option & I'll spend the rest on wine woman & song!
Joking aside... the question is one of plausibility NOT cost.Last edited by Slays; 19-06-2020 at 11:41 PM.
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freddyboy Thanked / Liked this Post
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20-06-2020, 02:26 AM #8
Slays,
Doubtless a 3 inch pipe will carry enough water to turn your pond over at the required rate, you would easily get aroung 650 litres per minute under gravity. The questions I would be thinking about though are - Would you want to increase the size of your pond in the future (seems like everyone does), when even a 4 inch pipe can block with leaves etc would a 3 inch pipe perform worse or even better since the flow would be faster? Many European filtration systems are connected with 70mm O.D. pipework.
I am a fan of anoxic filtration, that may be worth consideration for your bio side. Milaz put some anoxic in a wheelie bin (If I remember correctly) and did a write up on this forum. Personally I would probably go for a custom made box to hold some anoxic in one compartment and the return pump in another (to keep the turbulence down).
Kenny
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Slays Thanked / Liked this Post
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20-06-2020, 11:06 AM #9
food for thought... I will investigate if it is feasible to add anoxic filtration into my intended gravity eazy pod system & how it will sit after reading
www.mankysanke.co.uk
Doubtless a 3 inch pipe will carry enough water to turn your pond over at the required rate, you would easily get aroung 650 litres per minute under gravity. The questions I would be thinking about though are - Would you want to increase the size of your pond in the future (seems like everyone does), when even a 4 inch pipe can block with leaves etc would a 3 inch pipe perform worse or even better since the flow would be faster? Many European filtration systems are connected with 70mm O.D. pipework.
I am a fan of anoxic filtration, that may be worth consideration for your bio side. Milaz put some anoxic in a wheelie bin (If I remember correctly) and did a write up on this forum. Personally I would probably go for a custom made box to hold some anoxic in one compartment and the return pump in another (to keep the turbulence down).
Kenny[/QUOTE]
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20-06-2020, 12:31 PM #10
To be honest I did not really know what I was doing 7 years ago except move from a pond in the middle of the garden with a liner to a brick built with less maintenance so followed the advice and apart from having to change my UV unit this week have not had any other issues. My problem today is having gone for the same model I purchased in 2013 TMC have changed the model numerous times and now the down pipes are 6” wider so am having to adapt the original fixed 2” pressure pipes so that has been a pain in the arse. If you are happy with 3” as it will do the job then go for that......the money you save however where are you going to be to wine and dine the women as nowhere is open?
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Slays Thanked / Liked this Post
Best plants to remove Nitrate
pug has a very impressive veg filter on his pond, have a look at some of his his youtube videos....