i once went and placed my nose to the end of some plumbing a couple hours later to see if it still smelled. I was thinking if it didn't smell I was good to go.
My vision blacked out and I almost fell down. In my opinion that's not long enough to be safe. My guess is that the water on the welds causes it to finish curing pretty fast but that something will leach into your water... it might not harm anything that you notice of course. I'm sure the bond itself is safe for our reef pressures in 10 seconds.
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