So i went to walmart the other day and picked up a tube of silicone. This is befor i knew there was special silicone for aquariums. Anyways i glued a bunch of my rocks together with it that i want to put in my cichlid tank. The calk is grey dont know if that will make a difference. Will this be ok in my tank or do i need a pure silicone for aquarium use. Thanks
Izzie
Izzie