I actually boiled water, let it cool a bit then put the hydroton stones in that and washed them fairly well. I realized after my last post that it's one of each that's not looking so good; one it Rockwool and one in Hydroton only.

I'm a freelance programmer and right now the company I'm coding for is way behind on paying. Once they get caught up though my first purchase is going to be a PH pen and PH adjusters. In the mean time, I'm using a spa tester, not as accurate as a pen but I hope close enough to get by for now.

I also want to get some CalMag+ and superthrive as well. This is a fun hobby but no where near as simple as growing in dirt.

Will the PH down keep it down longer then the vineger that I'm using? Would lemon juice be better for adjusting it down?