True the rockwool may need to be conditioned, but itâ??s a very small part of the whole. The problem lies in the hydroton that is no where close to neutral.
Do your own search here on â??conditioning hydrotonâ?ť here on this site and youâ??ll begin to see what I mean

Do your own experimentâ?¦put hydroton in practically any Ph water and watch the Ph rise. I soaked hydroton for weeksâ?¦continually refreshing the water and the ph continued to rise. The Ph of the hydroton must be adjusted first.

Personally I gave upâ?¦.I gave the hydroton awayâ?¦.went to lava rock. One of my better decisions.

Good luck Bringon
HMR