i say this b/c finer gravels or sands cant be used with an undergravel. also, UGF are very inefficient when keeping much of a bioload. don't waste your money on a ugf. go with a canister or even a HOB just no ugf
welcome to MFK... nice to meet you... anymore you want to know..check out the filtration and set up forum..... any questions you have just ask...View attachment 383350