I have a 75 gallon tank for my 1 Red Eared Slider and 1 Yellow Belly Slider turtles. I've had this tank for about 5 years now and never had issues with it. This morning I woke up to see that the tank had lost over 3 inches of water and had been leaking all over the stand and onto the floor for what I'm guessing has been all night (it showed no signs of leaking before going to bed). It doesn't appear to have any cracks or breaks in the glass, but I'm noticing what looks like the sealant has been ripped off the bottom corner from my turtles. What can I use to fix that so I'm not having to buy a new tank.