Bought a used tank and its got that white hard water crusty stuff on the outside. Was gona use CLR but dont know if its safe on silicone, and yes i know u have to be very careful not to get any in the tank. Anything else i could use?
BlackShark11k;3869256; said:just use vinegar
DDFishPets;3869366; said:Just use the regular vinegar and a razor blade. Takes some time and effort but at least it's clean. Hope this helps.