Hey everyone I'm knew here as a member but have been browsing around the site for a while. A couple years ago I had bought at the time what I thought were bala sharks but after they had started getting pretty big I had found out they were in fact iridescent sharks. Rather than letting them sit in my 55 gallon tank I would like to build them a more suitable home but I don't want to spend a million dollars either. I have access to an endless supply of free oak 4x4s from my job and could probably spend maybe a grand on the glass. I'm really open to suggestions as I'm more concerned for my fish than I am with cost. I was thinking maybe a 8'x4'x4' but the price of acrylic seems way out of my budget. I'll be building this in my basement if that amounts to anything. Anyways thanks guys and I hope to hear some good responses soon. Thanks.