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Thread: JBR Aerated Bottom Drain
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03-05-2020, 10:56 PM #1
JBR Aerated Bottom Drain
Hi,
Can anyone tell me what the gap should be between the floor and the underside of the aerated plate? I.e. the gap which the water flows through to go down the bottom drain.
Thanks.
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04-05-2020, 01:45 AM #2
Cavester,
Small enough to stop the fish swimming in. Mine is 20-25mm though. Didnt stop a goldfish swimming into it. I found it alive in the filter!
Kenny
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04-05-2020, 01:51 AM #3Hobby and business gone but when you’re hooked you’re hooked.
Always happy to help!!
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04-05-2020, 07:44 AM #4
Hi Cavester. I recall there was some discussion about this on Feline's pond build a while back. Might be worth a read.
From memory, for a 4" pipe I recall someone worked it out that it should be no less than around 13mm.
So i think anything above that amount, that doesn't suck small fish in should be fine.
I think I went for a 20mm gap on mine and seems to work fine.
Sent from my SM-A520F using Tapatalk13,000L fibreglassed raised pond with window
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04-05-2020, 08:02 AM #5
Mine is set to 20mm, its small enough that fish cant get through and big enough not to restrict flow, even when it has a coating of bio film on the floor and bottom drain top
4600 Gallon Concrete Block and Fiberglass
2100 mm x 710 mm Infinity Window 32mm thick glass
2 x Aerated Bottom Drains and Skimmer
Filtreau HiFlow 30 Drum Filter
Bio Chamber - 140 litres K1
Bakki Shower - 30 KG Sakura Far Infrared Media
2 x 18,000 lh pumps
Heated from house boiler through a heat exchanger
Idealseal MS290
My Pond Build
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04-05-2020, 08:43 AM #6
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Cavester Thanked / Liked this Post
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04-05-2020, 08:50 AM #74600 Gallon Concrete Block and Fiberglass
2100 mm x 710 mm Infinity Window 32mm thick glass
2 x Aerated Bottom Drains and Skimmer
Filtreau HiFlow 30 Drum Filter
Bio Chamber - 140 litres K1
Bakki Shower - 30 KG Sakura Far Infrared Media
2 x 18,000 lh pumps
Heated from house boiler through a heat exchanger
Idealseal MS290
My Pond Build
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Cavester Thanked / Liked this Post
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04-05-2020, 09:17 AM #8
mine was fat finger gap,fingers under lip of dome just fit and fixed in place,,,,andi
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Cavester Thanked / Liked this Post
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04-05-2020, 10:12 AM #9
20mm is what I'll aim for then, thanks guys. Its just because I'm getting 25mm of PIR insulating on the floor before glassing so wanted to know what the gap should be.
Cheers.
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04-05-2020, 10:16 AM #104600 Gallon Concrete Block and Fiberglass
2100 mm x 710 mm Infinity Window 32mm thick glass
2 x Aerated Bottom Drains and Skimmer
Filtreau HiFlow 30 Drum Filter
Bio Chamber - 140 litres K1
Bakki Shower - 30 KG Sakura Far Infrared Media
2 x 18,000 lh pumps
Heated from house boiler through a heat exchanger
Idealseal MS290
My Pond Build
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....