Ghosty;212486 said:
Is it Phos or Vit-C that promotes Cyano (besides bad flow and bad lighting)? I read it isn't Nitrates, but mainly Phos. Didn't know you gotta watch for Vit-C...
From what I understand/researched, cyano growth is promoted by not just phosphate, but a PO4 - Nitrate imbalance. If you have phosphates and an absence of nitrates, you end up with cyano growth. If you have zero nutrients, obviously you have nothing to worry about...and if you have a balanced ratio, then macro algaes (or even nuisance algaes) are able to outcompete the cyanobacteria for PO4 consumption. Cyano also utilizes carbon for photosynthesis in the carbon fixation process...same as plants and algae. Vitamin-C is essentially a carbon source, which helps feed cyano.
Chances are if you have cyano under control, you would be fine to dose vitamin-C...but in my case whenever I added fuel to my tank my cyano immediately spread. I don't have a HUGE issue with it in my tank, and I have plenty of flow and good lighting. It's mainly just popping up in areas where detritus tends to collect on a few of my rocks. If my hermit crabs would stop eating my snails, I probably wouldn't have this problem.
![Wink ;) ;)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
I also got lazy and didn't change out the media in my GFO reactor for 8 weeks...and at week 6 I had done a tear-down of my tank to catch a coral-nipping fish. I should have replaced the GFO at that point.
In any case, it's almost under control again, but it's just always sleeping/hiding somewhere in the tank just waiting for a dose of fuel, lol. Last time I thought it was gone, I dosed some, and BAM it was back.