Quote:
Originally Posted by andresont
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I would respectfully disagree.
Small water change is Less stressful then one big one even if this means cleaner water, this does not mean large change of any sort is good for you inhabitants.
JMIO.
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Here is a good article to read about water.
http://reefkeeping.com/issues/2005-10/rhf/index.php
"The normally encountered differences in calcium, magnesium, alkalinity, nitrate, phosphate, silica, pH, etc., are unlikely to unduly stress organisms during water changes up to 30-50% using natural seawater or aerated artificial seawater, in my opinion."
In this article it says up to 50%. You do need to be aware of water temp and a few other things, but I'm still not convinced that a fish/coral living in a toilet that needs flushing, is better than flushing.
I have read a few articles stating this or similar types of opinions and even one up to 80%.
I think alot depends on how bad the nitrates are.
Scott