aaronstiff
Well-known member
I've been using a couple of tank de-icers in my black plastic water tanks for almost 3 months now. They're the kind with the metal cage around the heating element so that it is safe for plastic tanks. Just a few days ago I noticed a ring of rust around where the de-icer sits on the bottom. Has anyone else had this problem, or is it just me? Seems like they would be made out of something which didn't rust if they were going to be used in water...