Skimmer and cyano treatment

[Coralgurl]

Originally Posted by MarkoD

There is only 1 way to get it out completely:

Let the skimmer overflow until it stops.

So have it drain into a bucket or empty the cup every 30 seconds

My skimmer has a plug in the cup so I do let it drain back into the sump. I will do a few more wc, change carbon and then let skimmer run.

[MarkoD]

Draining it back into the sump won't do anything. You need to remove the water that overflows. That's where the highest concentration of chemiclean is