To install lay aquarium with the opening facing up, Insert the Conversion kit in to the black rim opening of the tank. When it is set in, squeeze a small bead of Aquarium Safe 100% silicone sealant to the outer edges. Smooth with a finger or caulking tool. Wait 24-48 hours to fully cure, NEVER put your animal in without cleaning the tank fully. Be sure the smell of the silicone is gone before housing your animal. Always follow directions of the silicone sealant. Be sure to purchase Aquarium Safe Silicone.