I've also found that, after adding pH Up or Down, the first dose seems to make the most difference, additional dosing, not so much ... I don't say that is the case, just that it 'seemed' like it, in my limited hydro grows ... :jointsmile:
the image reaper Reviewed by the image reaper on . Does pH Down go bad? Like the question says...does it? I've put three full doses in my reservoir in the last three days. One dose *should* have dropped the pH by 0.5, but the combined total of all three has barely moved it 0.3. I'm using the exact same set-up I've used in the past, so I don't *think* anything's buffering the pH. Could be wrong of course hehe. Rating: 5