What is the BEST heater available!

[atcguy]

I disagree with another pump . while another pump can add heat to the water . If you have any decent water volume in your tank it wont do. and to turn you pump on when the temp. drops sounds a little crazy to me. a titanium heating rod in the sump is the best bet. Avoid glass if you can , if they break they pollute your h2o.