When I dabbled in Zeo with my old 75g the folks over at the zeovit.com forum advised me that older tanks don't always react well to switching to a ULNS system and that one should ease themselves into it slower. Can't remember what all the potential symptoms were of shock but the one thing I do remember is I got a wicked and persistent cyano bloom a few weeks in. I ended up running a red slime remover treatment to get rid of it.
I don't really recall that it got rid of any nuisance algaes. I know for sure it did not starve out the stupid caulerpa problem that particular tank did have.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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