I want to do a diy filter for my AST, he's going into my 120 soon and I want to make the best filter I can, option one is a diy canister filter using a 50 gallon bucket, maybe ceramic rings as main bio media and some sponges for pre filter. Option two is using my 50 gallon and using either sponge or filter socks a pre filter and either ceramic rings again but a lot more then in the canister or using some kind of fluidized media. I kinda want to save money but I really want to make for the best filter I can any options is appreciated thanks