Planning a Bog Filter for My 1000g Pond

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Hello Folks, so I'm in the planning stages of a bog filter for my 1000+ gallon pond. I have acquired an 108g water basin that will become my bog. Planning an up-flow bog, trying to decide on the size of pump I would need, is there a turn-over calculation like one would use in an aquarium? How much flow should I be looking for through the bog?

My experience is with Saltwater Reef Tanks, we acquired the pond and its smaller 800g sibling in our recent house purchase.

800g after replacing the liner



Some of last years lilies from the big pond


Thanks
Colin
 
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Becky

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Hi Colin, I was going to say welcome to the forum but then I noticed your join date, so I guess "welcome back" would be more appropriate! :D

We have a few people here with bog experience, so hopefully someone will be able to help with your query.
 
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addy1

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Welcome back Colind I pump all my pond water into my big bog.

You want to push a lot of water through the bog but not so fast that it does not get filtered. I turn my ponds over about once every two hours. Have around 10000 gallons plus, pump is around 6800 gph without counting any head pressure loss. That flow keeps the pond in great shape. My best guess is 5000 gph goes through the bog. A small amount of pump water is diverted to a pass through flow in a 1000 gallon pond. My bog is around 26 feet long x 4.5 feet wide and deep, around 2ish feet
 
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Thanks for the welcome, I've kind of lurked off and on for the last couple years while I completed other 'projects' but now its time to focus on the ponds.

So going by your response addy1 I should be able to get by with 500gph through my bog?

Colin
 

addy1

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So going by your response addy1 I should be able to get by with 500gph through my bog?
With a well planted bog, water flowing through it, imho, you will be just fine. The plants do a great job filtering and using up extra nutrients.
 
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With a well planted bog, water flowing through it, imho, you will be just fine. The plants do a great job filtering and using up extra nutrients.
Thank you, now to look at my pump options, don't think I can throttle down the 2400gph pump I currently have. :unsure:

Colin
 

addy1

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Yes you can, just split the flow, have a T with a ball valve on one of the legs, the one going back into the pond, use that to send more or less flow down the open line to the bog part of the T. Tweak it until you are happy with the flow.

I have a T with a ball valve I can send more flow to the 1000 gallon pond or less just by setting it. I can also close and send all the flow to the bog. I usually have it about 1/4 open for the pass through flow into that little pond. Keeps the water fresh for the fish in it.

Thank you, now to look at my pump options, don't think I can throttle down the 2400gph pump I currently have. :unsure:

Colin
 
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