Well then everything I have built over the last few years is due to explode. My new reactor I pressure tested after 30 min. Sump 15. Other reactors were the same. Skimmers, waste collectors. et al.
Now if I were building a tank that was holding a lot more water and was feeling a lot more pressure and highly succeptible to those pressures I would take it much slower. If as well, was built of a lot thicker acrylic than 1/4" then I would wait.
Do it right and ensure that you have a strong bond and multiple angles holding the joint together(ie many sides of a sump, baffles etc, reactor) you will have the structural integrity that is sufficient enough to hold it together.
The only way I have had a leak was due to an imperfect cut made on the acrylic prior to bonding. I haven't ever had anything made of acrylic break. But I guess I should be knocking on wood.
Do it right and you have a strong bond within a short period of time.
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Darren
Always strive for the optimum environment, not the minimum environment
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