Prodibio for Cyano?

[Jackmot]

Hi!
So, after being "cyano-free" for a few months the thing just started to take over my tank again this week.
I've been battling for months with nutrient imbalance (NO3 in 20's and PO4 in 0) and this past few weeks my NO3 went down to approx 3ppm (without doing water changes or anything at all), my pods number grew dramatically, a brown algae disappeared, green algae started to appear on the glass, Kh went up to 11.3dKh and cyano came back.
Another interesting thing is that I've been dosing "flourish phosphorus" from seachem and my PO4 test still shows 0 so something is eating it up, maybe the cyano?

My idea is to add prodibio to outcompete the cyano and then bring my nutrient levels back up, what do you think?

Nitrate: approx 3ppm
Kh: 11.3 dKh
Phosphate: 0ppm

Green Star Polyp
Pulsing Xenia
3 turbos
very small of chaeto in the sump

Thanks!

 

[EeyoreIsMySpiritAnimal]

Sounds like a reasonable intervention. If you have access to it, I'd also recommend adding some live phytoplankton.

 

[Jackmot]

Thanks! I actually add live phytoplankton daily, it's grown locally in a LFS. I add 4ml of it for the 30L tank

 

[EeyoreIsMySpiritAnimal]

How is your flow? Low flow can also be a contributing factor.

 

[EeyoreIsMySpiritAnimal]

Thanks! I actually add live phytoplankton daily, it's grown locally in a LFS. I add 4ml of it for the 30L tank

Try increasing the amount...?

 

[Jackmot]

How is your flow? Low flow can also be a contributing factor.

I believe I have a pretty decent flow. I have 2 wave pumps of 220gp/h at 70% running alternatively, every 40 seconds the left one turns off, the right one turns on and so on...

Try increasing the amount...?

Maybe... How much would you add?