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Originally Posted by AndyL
ABS is fine for plumbing reefs, all your powerheads amongst many other components are made of ABS plastic.
Yes, it is not approved for potable water use in the house, but that doesn't mean it's reef unsafe. Just like CPVC (grey pvc - found in the electrical aisle) is also reef safe.
Andy
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If you go to the trouble and expence to make ro/di water for your reef, why would you want to use material that is not rated for potable water?
I realize that it might not kill stuff, but it's not going to help anything either.