Ricks, amazingly beautiful tank--the arrangement is perfect! Goingpostal, I also love your tank--those rhodactis are clearly thriving. You both are obviously offering your inhabitants what they need. I use tap water myself and do frequent (weekly or every other week) water changes. I am especially partial to anemones, and according to Joyce Wilkerson's survey several years ago, the tanks with the greatest success (survival greater than 2 years) with anemones were overwhelmingly in tanks that use tap instead of R/O. Arguably, that data is a little outdated now and with the available salts currently, I would run R/O if someone wanted to give me a unit (anybody?), but with the animals I keep (no sps) tap seems fine.
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