jrhunter0000;986413 wrote: Keep doing water changes and suck as much as it out as you can. Good luck
As much manual removal of the cyano as possible prior to treatment is one of the best things you can do. When I treated my 465 with Chemiclean a couple months ago, I switched out my 100 micron filter socks to 25 micron socks, then took a maxijet 1200 and blew the tar out of my rock, which dislodged a lot of the cyano and sent it into the filter socks. Rinsed the socks out a few times over a few hours, then treated with the chemiclean.
The more cyano you get out before treatment means the less dead cyano you will have decaying after you treat.
On a side note, a funny thing with this last cyano treatment. I have
always had my skimmer go nuts and over-foam post treatment every time I have treated, and coincidentally all my skimmers up until now have been
internal, but a few months ago I plumbed in a huge H&S
external Skimmer, and guess what?, after ChemiClean treatment this time
my skimmer only over-foamed for about 15 minutes, then returned to normal, not the usual 5-7 days I usually see after Chemiclean treatment. I have no idea if there is any correlation of internal vs exernal skimmers and the overfoaming, but I thought it was interesting.