I have had 3 of them, over 5 years, 1 out grew my 24 gallon traded it in, one out grew my 24 gallon and then my 55g, so I traded it in and the one I have now was a frag, flame angel ate quite a bit of it, put it in the 24 to recover, and doing well in there. Longest I had one was 3 years. So...