09-19-2012, 08:02 PM
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Umm, well.....Thats another topic of discussion. Now, being that I'm going to take it your asking me, I'll answer it this way. I only do water changes every 3-4 months based on the needs for Trace Elements. Now, I could go longer if I dosed those, but I don't. I dose Vodka to keep the Trates at a low level, along with my Sump. So, my answer to this would be as follows: If your water quality is still good, why change it. AS long as yoiu have nothing out of line parameter wise, I say, leave it alone.