DIY Indoor Koi tank & biofilter plywood 400 gallon

[BigMacBook1300]

Awesome

[fishingman636]

Y would u put a pond right there

[Zeamus634]

Nice setup!

[SimpLeeme88]

aerohusker; that's amazing that you made your own indoor pond!! :-) Question, though. I just bought two new small kois from Petsmart, the generic ones. I have a 30 gallons tank for them two only. What type of filters should I get, in order to keep them live and well?

[aerohusker]

please read comments below.

[bekko247]

hi, very nice video and nice kohakus btw, what dimensions are for this tank?

[metroid158]

did u know kois are edible,my grandpa ate a koi and goldfish and said it tasted like carp

[JimFritzMI]

Aerohusker, what dimensions are this tank? How deep did you fill it? It looks as if you used regular BC 3/4" plywood, yes? I am building a grow out tank for my basement, and this is remarkably close to what I was envisioning. The main difference I had planned was running the trusses for the sides vertically.

[aerohusker]

Thanks, the tank is made from 2 sheets of 4’x8’ plywood with a 14’x14’ vinyl liner. Ideally you want to go with a 4’x4’ square for max volume. I went 5.5’x2.5’ due to space limits. The greatest pressure is in the middle of sides, going vertical really doesn’t add much strength as horizontal would. I also added steel cable for insurance.

[AllAboutFishNFish]

Wow, thats an amazing set up !!!

[elegantkoiponds]

Hi their it looks great but I do have a sugestion for ya add a bigger pump they make external pumps that do 1500 gph and that would be a good flow for the tank. ( smaller pond usally need to be turned over more due to the high fish load they usally have) Also you might wanna add somem ore filtration. But everything looks good and the koi are happy thats all that matters right ?

[aerohusker]

Thanks, but 1500 gph is a little overkill. Depending on the load, it should be ok turning over at least once per hour to hour and a half. With two 258 gph pumps, 32 gallon primary filter and 10 gallon biological filter, with the koi in video it was more then adequate keeping the water in safe parameters. Now this winter (probably the first of December) I’ll bring them in, I plan on then using the outdoor 55 gallon up flow primary filter and a 900 gph pump as the koi have gotten bigger.

[aerohusker]

The protein is really not a issue, the video was taken prior to the weekly 15% water change.

[Arteolike]

You need a simple DIY protein skimmer as all that foam is cause all the protein in the water. Other than that the pond looks great and i like the kohaku! Thumbs up!

[kathshah]

Does 3/4" plywood hold very long for a pond?

[aerohusker]

The main support is from the 2"x4" bolted together. I added steel cable for insurance but it wasn't needed. After 6-7 months the sides are just as straight as when new.

[CrowdControl2K8]

cool...gonna make one for some koifry !... i like the batons on the sides... Nice, bright, freindly koi.

[nightstalkerrc]

i did the same thing...basement pond, mine is 800 gals. i live in michigan myself nice job on the setup.