You can also start rinsing and soaking all your hydroton as well.....first rinse as much the red dust off as you can.....then place a bunch of it in water....adjust ph to 5.6 and check in a hour or two......then proceed to do this same thing with the ph 9,000,000
times until the damn hydroton finally stays at the correct ph.....this can take a few days depending.

You know Flora Nova may be one of those that you might not need CalMAg......if I recall correctly but I'd have to check with my hydro guy to be sure. Again.....whether your tap water will stay stable at a certain ph is more the deciding factor on the water.