Was ordering supplies for my aquariums the other day and did a "doh!", remembered something you might want to ponder while you're in the test mode...
SeaChem makes a buffered copper additive called Cupramine for aquarium use that doesn't have any sulfates (for your algacide ponderings)... although I was fairly sure it would be fine I went ahead and queried them directly with this:
Quote:
I noticed cupramine has an amine bonded to the copper. Is there a possible issue with its use causing corrosive effects on metal parts of pumps, etc." and also "is it absorbed into or affect tubing of any kind?"
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(notice I didn't say waterblocks, lol)
and received this as an answer from their technical staff:
Quote:
It should not affect pump or parts at all. It is generally not absorbed or adsorbed by any of the tubing used in aquaria. It should have no effect in either case.
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Cheers