It’s for that some people prefer to use a drop checker solution, where you mix ph reagent and distill water that you bring to 4 or 5 dkh.
This way, no more guess...
4 dkh green at 30 ppm CO2
5 dkh green at 40 ppm CO2
100watt—neons T6—2 plant + 2 11,000k,
SoftWater Amazonian style,
Peat and Ferts,
Don’t tell me I howe my life to cyanobacteria!