Thank you everyone for the input. The reason I’m looking for Ca and Mg levels is the issue I’m currently experiencing with my Hygrophila Compacta which is new growth degradation. Specifically new leaves are growing very thin and translucent from stem towards the tip and also have curling edges upwards. Also it has loads of pinholes in old leaves and they got brittle. Previously roughly 2-3 month ago it was growing like a crazy. So I’m suspecting either Mg or B deficiency. My water is supplied by Bournemouth Water and according to my postcode the hardness is 15dGH which is matching my API test result. One thing I’m not sure about is which value in the report defines the Ca concentration in the water. According to API kH test kit is 9kH.
Let me introduce my fish tank.
It’s 80L but actual volume is 50L. Tank is 80cm width, 35cm height and 35cm deep. It has factory fitted LED lights 9Watt. It has internal filter Eheim BioPower 200 and has CO2 injected through flux bazooka in tank diffuser.
CO2 drop checker is lime color towards yellowish. PH about 7, nitrates 20ppm, phosphates 2ppm, ammonia 0ppm, nitrites 0ppm, 26c temperature. Lights are on for 10hours with 2hours break after first 5hours.
I’m dosing NPK daily:
N - 1.61ppm
P - 0.28ppm
K - 2.53ppm
CSM+B where daily concentration of Fe is 0.04ppm.
Weekly 50% water changes.
Water quality report attached