[syncro]

Originally Posted by Reef Pilot

Then dose MB7 which provides beneficial bacteria to your tank, which out competes cyano.

Thanks Reef Pilot. I did try two weeks of full dose MB7. Cyano grew back even faster while dosing. Do you think I need to dose longer? The bottle is over a year old (though stored in the fridge and no expiry date listed) so maybe it isn't active now. The problem with MB7 is we don't know what bacteria is in it - what does the bacteria need to grow (carbon? nitrates? hamburgers?)

I would never intentionally add nitrates to a tank, given all my effort over the years to get rid of it.

I understand. My tank has had 0 nitrates since the cycle ended. I think because of the DSB.