It slowly came back, I syphoned it off yesterday and I've gone black out for theee days again, but at on day 3 I'm going to add aqua medic anti red at the correct dose as last time I under dosed.
I have a feeling that my cyano was feeding off nopox as my nitrates are 1 or 2ppm and phos had always been around 0.03 even after removing it all last time during the blackout and testing after so I don't think cyano is consuming them giving a false reading. I added a brightwells nitryx brick four weeks ago so I should be able to stop dosing nopox completely.
My flow has always been good in the tank, I had to turn it down because I had no spots for my Lps to be shelted.
It's frustrating but at the same time I don't really mind as it's pretty harmless apart from looking unsightly.
Good post, I think I have both spiraling and cyano so started with 14 day treatment, marginal results at day 7 grows rapidly over 3 days so do a water change hope that is helping atl sat it looks better. At day 14 will switch to chemiclean