How to know if you should be using CalMag

[camille1585]

Originally Posted by YetAnotherOrchidNut

Please don't. I value your opinion and reading your post lead me to investigating more on my own and im not sure if I was right, or if it depends on the ph balancer used. Also I am inclined to think that where you live and where I live the water management policies and quality levels are likely similar if only because of the shared regulatory regime. The water in Amsterdam is not chlorinated, is yours?

I don't think mine is chlorinated either. My tap water is purer than yours, probably because I live on the south edge of the Veluwe with the poor, acidic, sandy soils. The pH is also high (8) but I usually leave it as it is, and occasionally adjust with citric acid.

I can't link to the pdf directly (it's a download) but if you go here (Waterkwaliteitsoverzichten | Waterbedrijf Vitens) and look up Wageningseberg, you'll see my water quality report. (Note, list is not in alphabetical order!) Following advice from Akerne, I use Rainmix fertilizer because my tap water is very pure.