repeating Chemiclean treatment

[asylumdown]

After battling cyano for months, but consistently reading undetectable levels of phosphate and nitrate, I dosed my tank with chemiclean. I know this is controversial to some people, but in my mind, cyano is a better competitor for nutrients like phosphorous than any GFO resin will ever be, and if there's cyano in there sucking it up the second it's liberated from my rocks or what have you, my GFO was never going to win.

24 hours after dosing when most of the cyano was dead, my phosphate levels went from 0.00 to 0.05 on a hanna checker, so either the Hannah checker is out to lunch or I was right.

I changed my GFO resin and today my Phosphate levels are back down to undetectable levels, but there's still a few patches of cyano left. I look at this stuff like an infection, not an algae, so I want to make sure it's completely gone.

The Chemiclean box says you can repeat the treatment if necessary. I'm assuming that means after the 20% water change. Has anybody dosed a second dose immediately without letting the first dose be 100% skimmed out? So far I've seen no ill effects from the first treatment.