I found a 30gal tank but the problem now is that i got the 30gal out and it turns out the bottom of the tank is cracked. There is one long crack that goes from one end of the tank to the other (that one is silconed) But there are then a bunch of smaller cracks on one one of the ends. So i was woundering if i put the UTH on the side with just 1 crack will it make it bigger? or make more? or melt the silcione? Just woundering if its fixable because i dont wana waste some silicone on it if the tank is still usless.