Alrighty, so i am only 16 turning 17(in jan.) and i already have a backyard pond which is not going so great. i plan on tearing that one down and building one in my basement!...i already have pond liner(the black sheet). i forgot how big it is, i think its about 12' by 8 or 9'...iono but i have a little room in my basement where my dad used to raise his chicken(yes i noe i live in milwaukee but its cuz im asian lol) but now there's nothing in there and its a decent place to have a pond. ok so now i plan on to evening out the walls with wood, place carpet on the floor(about 3 layers) and also put carpet along the walls to make sure the wood doesnt mess up my pond liner. Then make my own homemade pond filter...now the troubles that i face are....where can i find cheap carpet and how much do you think all of this would cost? and im not digging a hole im building it up! let me noe wat you think and help me through this process THANKS ALOT! I look forward to your helping hand and building this!