It seems that each time we've gotten ready to go on vacation - a major problem happens with the tank. I don't know if it was from the covering (for painting) or what but went to turn on my lights and saw a fizzle and pop and smelled a burning smell - so needless to say - not going to chance it and purchased a new unit - of course to the tune of additional money that I hadn't planned on spending right before our trip to Hilton Head. My return pump stopped working right before our trip in June. Man, this hobby sure can be expensive - I shouldn't have needed to replace these things so soon - about 2 1/2 years on the light and 2 years on the return pump. I didn't think I did either on the cheap - the pump was recommended early on by a 3reef member and the T5 was a medium priced unit with a fan and reflectors.