So a quick search is only returning that which I already use for buffering, GH pH down. What are some options for other, more stable buffering agents?
I wonder if there's some relation to the combination of rockwool and hydroton that could be influencing the swing? Or maybe some interaction between silica, Front Row AG,
hygrozyme, and
hydroguard at this point? Perhaps even an excess of one of the compounds?
Front Row AG has buffering agents, but they don't seem to really compete with my dosing of silica. I run ~15ml
protekt to 9 gallons of solution. Per the label, they recommend 1/2-1tsp per gallon, so 5-10ml per gallon, which I run right up the middle.
Do you think that's a contributing factor to the rapid swing? A full ten point increase in pH over a period of 24 hours seems quite drastic.