I have a planted tank that is currently been running for about 6 months and everything seems find, plants are growing, but lately have been seeing some yellowing in older leaves and as well as pinholes and brown dots (diatoms?). From what I understand this is a potassium deficiency. I'm currently only dosing with Seachem Flourish twice a week, which is just micro nutrient from my understanding, but I have the feeling ill need some macro nutrients?
My setup is below:
ph - 6.8-7.0
Ammonia - 0
Nitrite - 0
Nitrate - 0 - 10ppm very hard to tell sometimes, more on the 0 side. Which I'm guessing I need more of.
Also injecting CO2
Is it worth getting the Seachem Potassium and dose with that?
I can see a lot of people around here love the dry ferts, but being a newbie makes me a little uncomfortable until I get the right balance.
Any suggestions or advice is greatly appreciated. Thanks