cajungrl81
Aquarium Advice Apprentice
During the fishless cycle in one of my 30gs, crystals began forming on the outside of the heater. Is the heat causing minerals to precipitate out of the water? Or is something else going on? Should I remove the crystals before putting in the fish, or will it be safe as-is? Both aquariums are fresh water, and this only happened in the tank with the higher heater setting