I am wondering if my tap water ok to use as it is?
I took the data from the city :
The average hardness (CaCO3) is 116ppm.
If I'm correct, CaCO3 is what makes KH. And GH is made of KH + other minerals, right?
116ppm would be about 6.6DKH. And GH would be higher, but I don't see it listed in the water analysis.
Is this an acceptable value for water hardness?
Also, since I'll be using CO2 and it decreases pH, it should also decrease KH, right? So the effective KH would be lower than this?
And I've read magnesium is one important mineral to look at. I'll dose dry fertilisers including Plantex CSM+B which has some magnesium in it. Will that be enough?
I could also use my RO/DI unit, but if my tap water is acceptable as it is, it's probably useless to have it remove minerals only to add them later.
So what do you think?