I bought 7 of these 2 50W and 5 30W. I tested the first 2 and they didn't heat 3.5 gallons to 76 degrees so I tested them all and none of them worked! All but one turned on and then off and didn't warm up again, the water stayed at 70.5 for 48 hours. one heated to 80, turned off and not turned on again. After 48 hours the water temperature was 71.8. I no longer trust Revain's reviews. From now on I will seek reviews from other places before buying from Revain! Now I'm having trouble getting everything back.
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