Bog building, also called upflow filter, eco filter, wetland filter

[Jhn]

Have my bog gravel a couple inches below waterline and 2-6” above In spots.

 

[addy1]

2" below to 2" above

Mine varies from above to below and a nice stream type flow down the center to the water fall rock.

 

[DanielleB]

I've been through this thread a few times but I haven't seen anyone address length of bog vs width? I was planning for a 3 ft narrow bog and possibly 15 feet long? 1 long length of slit pipe under a half cylinder culvert? Anyone able to point out any issues I'd appreciate it.

 

[GBBUDD]

the half cylinder culvert may be a problem . the cut edge could damage the liner and depending how deep the gravel the culvert gets it's strength by being a circle but cutting it in half reduces its strength greatly. for a dyi look at leaching field dispersion chambers. though i have never used them

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[addy1]

I've been through this thread a few times but I haven't seen anyone address length of bog vs width? I was planning for a 3 ft narrow bog and possibly 15 feet long? 1 long length of slit pipe under a half cylinder culvert? Anyone able to point out any issues I'd appreciate it.

Mine is 27 ish feet x 4.5 ft I used two inch pvc pipes with slits.

 

[bagsmom]

the half cylinder culvert may be a problem . the cut edge could damage the liner and depending how deep the gravel the culvert gets it's strength by being a circle but cutting it in half reduces its strength greatly. for a dyi look at leaching field dispersion chambers. though i have never used them

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This is interesting! I was considering the half culvert pipe, too, but now I am rethinking it. This leaching chamber is very tall. My bog isn't all that deep. In this case, it seems like I would be trading a lot of gravel space (and surface area for good bacteria to live on) for this settling/water space.
I can research if they make anything a little bit smaller.
I do have this 16" culvert pipe just sitting here, though. I was going to use some of it for a fish cave, cutting it it half and sanding down the edges. I wonder if sanding the edges smooth would help in the case of the bog settling chamber application?

 

[GBBUDD]

My bog isn't all that deep. In this case, it seems like I would be trading a lot of gravel space (and surface area for good bacteria to live on) for this

That's why I deleted my 24 inch culvert and did not go with the leaching pipe and just bought the aquascapes centipede. Could I have bought a 8 inch or even a 12 inch yes but I preferred to get this done asap before warm weather came in.

 

[GBBUDD]

If your talking a foot of stone over a half culvert. So long as you placed the stone evenly to both sides at the same time it should be fine but I do still worry about it cutting into the liner as double walled will be a challange to keep sharp edges away. I bought a cap for the snorkel but placed it on the bottom to keep the cut edge away from the liner

 

[DanielleB]

the half cylinder culvert may be a problem . the cut edge could damage the liner and depending how deep the gravel the culvert gets it's strength by being a circle but cutting it in half reduces its strength greatly. for a dyi look at leaching field dispersion chambers. though i have never used them

I was initially looking at those leaching chambers too but I'm trying to find something like OZponds used in his. Whether that will be possible in the states is another question.

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[GBBUDD]

HE'S USING THE SAME AS THE LEACHIUNG CHAMBER different name

 

[snoozer]

So, I am looking to add a bog to my pond which has been running, now that i really think about it, for probably 15 years. It is built with 14" deep plant shelves that are 3 to 4 foot wide. I have the large boulders with river rock behind and between for stability on this shelf. The nooks and crannies between some boulders do have plants so i guess it is already kind of like a bog within the pond. I have no real filter. just the skimmer pumping water to the header pond for the waterfall and stream.

Now here come the questions, dumb ones I may add. Do I measure the pond surface area by the dugout dimensions of 25ish x 35ish at the widest points (it is an irregular shape) or the surface exposed inside of the boulders? With the plants and rock that I have in the pond, would i still need to have a bog 30% of the surface area, or could I go smaller? I was thinking 15'x5'x18", so would be only 10 to 15% of the ponds surface area. .

The actual bog placement, hmmmmm. Where I would like it, is on the end of the pond in the first picture. The stumbling blocks for installing there would be the skimmer, the two 2" pvc pipe going up the berm to the header pond, and the overflow pipe. I am thinking having pipe buried under a few ton of pea gravel isn't the best option. The second picture shows where is would probably make more sense but that is the easy way to the header pond and I wander up there all the time and I don't really want it there. Any ideas how i could make my preferred placement work or should I just go the easy route and build it on the waterfall end?

I have about 15 inches of liner overhang of the EPDM liner of the original pond. I am thinking of using RPE for the bog as it is strong and much lighter than the rubber. I am not getting any younger and the lighter weight will make it easier to deal with. Would I need to joint these somehow? How far over the original liner would the RPE need to overhang if it was above the surface level of the pond?

What is the best placement for the pump? Bottom or on a plant shelf. How many GPH would I need?

Can the pea gravel be placed directly over the PVC pipe? I have looked at so many of the comments in this thread that it is kind of overwhelming. I don't want complicated or expensive and after 15 years maybe it isn't needed but looking at the normal green spring pond waterm I am thinking it won't hurt either.

Sorry for the rambling post of dumb questions. Out to work on the pond now.

 

[bagsmom]

I know many others will love to hop on here and give good, detailed advice! You have found a good group of helpful people!
Many of us on here are a little on the older side of things, too - although one of us is 14 years old.
I think that first picture looks like a great place for a bog! I always suggest getting on YouTube and watching some videos. I am currently enjoying Ozponds. He has some great DIY versions of the fancier (and more costly) professional set ups. I love watching Ed the Pond Professor and Team Aquascape. Team Aquascape has a few videos of adding a wetland filter to an existing pond. Some of their projects are massive - but the general set up and process are the same. You will find that there are many right ways to make a bog. From everything I have heard on here, they are extremely helpful and pretty forgiving.
I will look forward to following your bog addition!

 

[snoozer]

I know many others will love to hop on here and give good, detailed advice! You have found a good group of helpful people!
Many of us on here are a little on the older side of things, too - although one of us is 14 years old.
I think that first picture looks like a great place for a bog! I always suggest getting on YouTube and watching some videos. I am currently enjoying Ozponds. He has some great DIY versions of the fancier (and more costly) professional set ups. I love watching Ed the Pond Professor and Team Aquascape. Team Aquascape has a few videos of adding a wetland filter to an existing pond. Some of their projects are massive - but the general set up and process are the same. You will find that there are many right ways to make a bog. From everything I have heard on here, they are extremely helpful and pretty forgiving.
I will look forward to following your bog addition!

I am past full retirement age, let's leave it at that. I will see what I can find for the return flow to the pond. I just don't want 6 ton of gravel over something i may need to get to.

 

[addy1]

The 30% is a suggestion, even smaller it will still help. You can make it simple like mine, or complex like others have. Mine works fine, theirs work fine.

 

[combatwombat]

I’ve never worked with EPDM. Is it like a little princess that needs babying? I just can’t relate to this intense worry about a 1/2 pipe culvert cutting my RPE liner.

If it’s a real concern, just put 2 extra strips of fabric down to pad it. Or place a layer of gravel first and place the pipe on that.

I can overthink and worry with the best of ‘em, but this one seems totally overblown.

But again, I don’t know EDPM well.