Just wanted to tell everyone how absolutely exceptional the customer service is at Reef Breeder. Reef Breeder Exo ATO was giving me some issues. Called and spoke with Logan. After talking thru my concerns, and getting advice, he felt it would be better to simply send me a replacement and return shipping label now and when I had time to swap the units out I could send the old unit back. I really wish companies would learn his methods, as they now have a customer for life!