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Removal is good, but it doesn't SOLVE the problem, which is either not enough current, or too much phosphate in the system.
Tell me what you're using for circulation (brand and model of powerheads/pumps/filters) adn the size of your tank.
Most likely though, it's too much phosphate...which you'll need a phosphate test kit to confirm. I recommend the one by SeaChem or Salifert.
siphon it off daily, do water changes with ro/di water, reduce lighting, increase water flow and cut back on feeding until you have it under control. Also replace the floss in the fluval if you have not done so recently.
same here with chemi clean. I use it to get rid of the algea while I'm doing water changes 2 times weekly. Just be careful with adding things in the tank to fix problems. You have to get to the root of the problem to truly fix it. If not the stuff will just come back quicker.
I was nervous about using chemi-clean as well, but it did work for me. Of course you have to find the root of the problem. I suggest looking at phosphates, and then lighting. It'll take time to fully get rid of the cyano, but with patience it can be done.