Waterweld epoxy for reef tank

I have used JB epoxy waterweld/marine many time in small amounts and never had any problems. If you are worried about the skimmer going crazy, you can just turn it off for a few hours while it cures. I have never had an issue, but it was in small amounts in about 200 gallons of total water volume. Superglue is ok, but I find you have to use a lot in my experiance and the gel version works best.
 
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