What do you use for your fish tanks and where did you get them? Particularly if you tank is over 300 gallons. I can't find anything except really expensive ones.
I am currently using an open top 300 gallon poly tank for my fish. A friend gave it to me for free. It appears to have been some kind of warehouse container or something. I would love to find another one somewhere.
The other photo is mine with tilapia under thick cover of water lettuce.
Hey, I think that if you were to dig the pond by, for example 4' at the base and where it comes out to the top of the ground make it 5' wide so that it is tapperd away and might not cave in. Since the liner and water will help keep pressure on the walls. Just a thought.
It's a floating plant like duckweed, only bigger,