I have a 30 gallon aquarium that had a small leak. I drained the tank, dried it up, and put some silicone rubber on the inside, and outside at the place where there was the leak. When I set the tank up again, there was no leak! It worked great! But when I added the fish, in about 4 hours, every single one of them died. I'm afraid I used the wrong kind of silicone that was obviously not aquarium safe. I used White Lighting: Silicone Rubber all purpose. 100% silicone sealant. I later realized there is a Silicone Sealant made just for aquariums that can be found in pet stores. Is my tank now useless? Can I peel the sealant and apply aquarium sealant? Will it permanently toxic my tank? Is my tank just not cycled properly or did I do something else wrong? What should I do?