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I did about 30% after my cyano was all gone, it took a bout one day and I had alot, not as much as you but close. lol
You can wait or you can dose it now. If you cut the lights and stop feeding the shrimp for a few days the cycle may complete. Me, I;d do it now just to be rid of it, and worry about the cycle after it was gone.
Ok that works then. The cycle should be done within the week so I will pro just wait till it finishs and do like a 50% water change to get rid of the cycled and the cyano. Would you think that would be good?
Just use the red slime remover or chemiclean and then do your large water change. You can also just do a a major cleaning and keep doing water changes instead of using a chemical. It will take considerably longer but can be done.