i just noticed a small leak in the top left hand corner of the tank. I have some Loctite clear silicone adhesive sealant. Knowing that there may be problems with poisoning the critters in the tank with some sealants, I note that instructions on the tube talks about "aquarium building and repair" so unless I'm told otherwise, I assume that I'm good there. Again, I assume I will have to lower the level of the water in the tank, let the area dry and then apply the sealant on the inside of the tank and let it cure (instructions say 48 hours) before bringing the level in the tank back up to the normal level? This problem is new to me, so I need some guidance and help please!