I was under the impression that, while plants need phospahte, high phosphate
levels favor algae growth. Is that not true?

Doug

wrote in message
oups.com...
High PO4 is good for planted tanks.

SeaChem, Kent virtually every brand now sells PO4 additives for planted
tanks.

Tap is fine.

See www.BarrReport.com and articles- Estimative index

Using RO will only make more work for yourself.
Why take something out and then add it back?

Marine reef tanks have no plant biomass to speak of, so you attempt to
limit micro algae.

But if you use a large macro algae, seagrass biomass refugium, you have
excellent results.

Making the water change easy as possible will help.

Regards,
Tom Barr