Heater?

[reefaluva]

Just wondering what most reefers are using for heaters. I know everyone has there favorite. Right now I am using a rena cal 300watt. The damn thing is set on 84, water only gets to 80 at the end of the day.. Which is fine but when we are gone all day for work, my heater is not on at the house. Temp in house gets to about 62-63 tank drops to 78 possibly lower. I get home keep house at 68-70 heater in tank has np keeping water 79-80.. What shall I do? Get another heater? I always can add one but only have 1 outlet left... might need it one day for something like a phos reactor who knows) would like to keep my temp all day all night about 80. Others have probs like this?