Originally Posted by fbm
I use 2 visi therm stealth heaters. Just because they will not break like glass will. Plus they are warranteed for life and I have temperature fluctuations of at most .2 and most days doesn't move from 79.8. And also the temp indicator on the heaters are pretty accurate as well.
I have two VisiTherms too (200w X2 for a 90g, one in the sump and one in the tank) and so far they're working well. Granted, only been using them for 4-5 months (Hardly a good case-study period), but they keep the temp pretty steady, maybe .4 or .5 variation depending upon what's going on with the ambient temperature. At night the house can get down around 60-62 degrees F, but the tank's always right about 77.5.