I've always used it Image Reaper and never had a problem but I wouldn't say I need ph up very often or in very large amounts. Part of this issue is that the seedlings are on small amounts of nutes so already the ph isn't so stable. But when you adjust it (and I use a syringe and needle so SMALL amounts) sends 2 points off in the opposite direction and then you go back and forth which is a pita and I believe that's why I'm having salt overload issues. Normally it doesn't take that much either way but I"d say when I mix up a 3 gal batch of nutes a good pinch of baking soda goes in each one right from the start because the ph is always low before I adjust it. So my vote is yes.....but....me and soil.....well......you'd probably want to get some REAL info from someone who can actually grow things in it rather than take my word here.....

Update: Seems to be acting exactly the same now....rising at approximately 0.1 point an hour just like before. That's a shame because I had high hopes for it this time..... hydroton has a lot of good points but I just can't seem to work around this. We are leaving town for a few days and I will probably lose them to ph issues.....I have a friend who will be taking care of the animals but she certainly can't be here four times a day to play with the seedlings.....sigh. I'm bummed but they are only a few weeks in so if I do lose them I'll BIRTH ME SOME MORE RHINOS.....