Geez, you do indeed have a very short term memory, or just extreme tunnel vision... Theory is all great and valid. But there are proven practical solutions, too. And really easy and cheap, in this case, as a preventative.
http://www.canreef.com/vbulletin/sho...947#post858947
And stop making me feel like this...
You have a beautiful tank, despite your cyano and other problems. I'm just trying to help you make it easier to maintain...