I have a 55g tank I am no longer using. It is free to anyone that wants to come get it, it probably has a few scratches and needs a cleaning but it would make a good sump or frag tank. I have a 29 gallon bow front that is in about the same condition. I also have a 20g that I was using as a sump/refugium, it still has the chambers in it and worked really well for me. Like I said all is free but I would happily take some frags...