i didn't realize that the inside components of a heater contain such harsh stuff inside..who was the manafacturer of the heater?

visi-therm is the maker of it they arent the best known name but i like how they look and are very accurate.

Copper was my main concern, well it was a small heater so i dont know if it caused a big deal. But no harm in throwing most of the pieces in the top of the toilet and letting them freshwater flush for a month...

Thanks for the replys

Play with the rock - buy a cleaner shrimp and a damsel and see if they suffer ill effects within a predetermined period of time.

Then you'll have your answer.