I think that heater has heating problems, if I'm thinking of the right one. Dramaqueen and one or two other people (here) have had over-heating issues for under 3 gallons (80, nearing 85?). I also believe Dramaqueen said she would recommend it for over 4 gallons? However, I don' tknow if it's either a bad batch, or something else, because I haven't used it personally. Batch would be doubtful though.
Just thought I would take a mention to it. I find it really weird as people use the Tetra 25watt one and have no issues. Yet this is 10watt .... then again, I have no clue what watts really are...haha