Quote:
Originally Posted by Casey8
hehehe ... if someone can prove it that I don't need it for my sps corals then I will shut down my R/O right away.
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Well, I reckon it boils down to what the TDS in your water consists of. If it's all calcium or magnesium, you're good to go. There should be some reports available from your water supplier, city I suppose, that lists the parameters. Chances are there are traces of undesireables, so in the end an RO is a good investment. And at your low TDS numbers, the membrane should last for a looooong time.