Dosing breaks on Tropic Marin Cyo-Control

[DEL 707]

I have cyanobacteria problem in my tank.
I did a course of Cyo-Control, following the instructions. I did 5 days.

I did see a large improvement, I lost a good chunk of the cyano on my sand. But I still had a little patch which has started to grow back (I stopped dosing over a month ago).

Is it too soon to start dosing Cyo-Control again. Or can I simple keep dosing until the cyano is gone?

 

[Subsea]

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