I have a 8 gallon 12"x12"x12" tank that has been established for around 2 months now with red cherry shrimp. I am using Aquasolum soil. I have a pressurized CO2 system here going at around 1bps and my Par levels are around 100+. In here I have some Anubias, Bacopa, and DBT. It has been during the past two to three weeks when my DBT are starting to yellow and die off. I bought these DBT submersed from my LFS and they are around over a 1.5 old in this tank. I have read on here that it may be a macro nutrient deficiency, so I went ahead and bought the following ferts and dosed:
Flourish (everything) 3x week
Flourish Potassium 2x week
Flourish Phosphorus 2x week
Flourish Nitrogen 3x week
I noticed that my nitrates were constantly hovering at 0 ppm even adding the Flourish Ferts. Just two days ago I added around 1.5ml of Nitrogen and after waiting around an hour to check results, I had around 5ppm from my API liquid test kit. The bottle says to double this amount after dosing so it ended up around 10ppm I assume.
Today when I checked the nitrates again, it was back to 0 and I just added 2ml of Nitrogen again. What is concerning me is am I adding too much Nitrogen? The bottle instructions says to add much less than 2ml for my tank size but it just keeps going down. I am looking for some feedback on how I should control my ferts on a weekly basis as I am still a beginner in this. I really want to save my DBT.
Also my Anubias are also yellowing on the leaves as well. Not sure if this is an indication of anything
After the recent fertilizing I am getting some sort of hairish algae on the tank glass, and some sort of green bead algae that looks like little balls on the rock.
Thank you so much!