silicone won't stick to silicone... bad news is either you pull the entire tank apart clean all the seams and reglue it or find a new tank.  sorry i just went thru the same thing with a sump. turns out that it's way easier to build a new sump than repair an old one.
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Given sufficient thrust pigs will fly just fine.
90 Gallon LPS tank - Challice, Acans, Favia, Diplo and Zoos
125 Gallon SPS Coming Soon!
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