I've got a tropical fish tank, so a heater is pretty much required unless the water itself will magically maintain it's temp... In eithercase, in the past I've had algae and the alike clouding the tank because of the warm conditions. That may be that the heater was on too high or whatever, this one automatically keeps it at 78 + or - 2 degrees... Is there a way to avoid the algae or has the heater keeping it at that temp range prevented it?