I was patching a leak on my sump and dropped some weldon 16 in my refugium. It did not break the surface and I was able to remove it in a couple seconds. Will I kill my tank when I restart the pump, or am I all clear?
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FWIW, you should probably use some weldon 4 for a stronger fix. I don't know how well weldon 16 will hold up. I'm sure Troylee will chime in to verify, but this sounds like a temporary fix at best. He may reccomend cutting a scrap piece of acrylic and attaching it to the surface of the crack
What would you have drilled a hole on each end of? The scrap piece for patching, or the sump?I also would have drilled a hole on each end before patching it....
Being that the make up of weldon 16 is much the same as "super glue" with additional polymers and solvents. Hydroquinone, Ethyl 2-cyanoacrylate, and Polymethyl methacrylate all of which react insantaniously with water, they will form a film on the outer most edge of the bead. Of course this will not aid in properly curing the solvent by allowing the solvent to evaporate, you should be fine. The solvent that might transfer in to you water column would not reach a significant concentration. The best thing that you could do is add some active carbon just as a precautionary step. When you have the time I would drain the system and re-bond the acrylic properly at the same time you will be doning a water change to remove and potential toxins.
Good luck!
I drained the return but not the refugium, and the piece of plastic extends under the bubble trap. After I finished the double seal some went into the refugium.