Framed indoor greenhouse bog

[velokoi]

I am waiting to build my outdoor pond while I find a leak in my sprinkler system that has flooded my new pond area. So why not practice my bog building in my koi greenhouse.

I started off by moving my small waterfall bog and prefilled and replaced with a framed 4 x 6 foot wall with 45 mil liner and carpet. I am adding a 2 in abs pipe with 2in slits every 2 in with an air stop at the start and a clean out at the end. Just about to start gluing it.

Then I plan 3 in plus rock at bottom to fill the 3' by 4' 8 in deep hole at bottom then top with 10 to 12 inch of pea gravel and place about 20 plants.

Estimated 4 to 8 hours, on about hour 20 and still 4 plus to go to rough it in. Will have a 30 in wide water fall exit over a flat rock and covered edges.

 

[velokoi]

Well maybe one more day, moving rock took forever. Plants and top frame tomorrow.

 

[velokoi]

Greenhouse bog is substantially complete. Just drilled holes in my waterfall rock and attached it with 1/4 inch carriage bolts. Key was to drill with 5/16 into rock and 1/4 into the wood. The 5/16 allowed the square to lock in while the 1/4 wood kept the screw tight while threading the nut. Got lucky and the bolt bit into the rock to give a smooth edge for liner.

You can see the old but nicely mature 2sf bog that kept the 7 fish healthy. I just wanted room to feed them more and let them grow as well as get some experience with more plants and designs while I get ready for my outdoor fun.

 

[velokoi]

Done for now. Last step will be to mortar the waterfall. I like to wait a few weeks before doing that to tweak things and make sure no leaks.

 

[velokoi]

My goal is to ensure this can support 10 fish. The old bog handled 7 @ 15" with no water quality issues but I felt I was at my limit. Found one baby koi from the late spring breeding that somehow survived.