Re: Aquatic Plants Digest V1 #90

I just installed an under gravel heating coil for my plants. After leaving
it on for a day, the gravel is over ten degrees (about 84 degrees) above the
initial temperature. The question I have is, how warm is too
warm before I start cooking the roots of my plants?

It's a 50 gallon tank, w/30 guage wire at 12 volts. Thanks.