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- Oct 6, 2018
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It is either vinegar or ammonia (depending on what you used) - and probably a small amount - but it won't seal if its still leaking. I would let it drip into the sump - at this point (right - its not leaking on the floor, etc) - and it cant leak any more than the water flowing up from the return??) - and I would talk to redsea and try to figure out why it doesnt fit. Good Luck.
this is what I used...it is leaking into the sump only right now. So my biggest concern is contaminating my tank with the silicone. I would feel better knowing I’m okay with the silicone not being cured