don`t use any of the addatives with exeption of bio bloom for feeding, no calmag etc, my waters a little harder than it was in the previous place, i`ve jst let it sit in a watering can for a day or two to gas off and warm up slightly thats about it, if your haveing trouble with your water from the tap, toss a bucket under a drain pipe and collect the rain water....
i`ve not arsed to set up any rain collecting barrell here and the waters a tad hard on them, but that said i`ve no real care for it at the minute either they`ll grow through it or not hahahahaha....