as far as I know spray paint is ok to use in fresh and saltwater as long as the paint is fully cured, try this spray your piping and let it dry for 2 days then soak the pipe in freshwater to wash any residue(shouldnt be any but just incase) and you should be sailin towards the sunset.
Btw love the new cube are you painting the back or using acrylic overlay?
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Always looking for the next best coral...
90g starphire cube/400mhRadium20k/2 XHO/2x27w UV/2x39w T5/ 3 Trulumen led strips
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