Just a little revival here. Have a healia 150w res heater which is good water in res i have set up at about 26 degrees in the hope that in the buckets it will be somewhere between 18-20 but still cant seem to keep water temps up when lights off. Room temp with lights off about 18 degrees but water sits at about 12-14 so not too sure where yo go from here. Cheers for advice in advance