Power Towel
Member
I wish it were as simple as the ph roller coaster. I would be happy with fluctuations both ways. Unfortunately, it only goes one way, back up toward the original ph of the tap water - 8.3.
After some research I have found that a lot of tap water has built-in buffering capacity due to the dissolved ions. So basically, I add acid, it goes down for a very short while, then ramps right back up to the original ph (or very close to it) because the buffers are binding up the free acid.
If I add acid long enough, eventually the buffers are all bound up, and then I will see sustained ph drop. And THEN I can worry about the roller coaster you mention, Illegal Smile.
I REALLY didn't want to have to deal with RO water and added micronutrients etc, so I'm not happy about this. What I may try is a Brita filter, or maybe a sock full of activated charcoal, to pre-treat my tap water and hopefully take out some of the buffering capacity so I can bring it down from it's "native" 8.3 ph.
This just couldn't be easy, could it? Maybe in my situation it would be easier to go to soil. Dang.
At the very least, for the next reservoir, I will pre-ph the water for however long it takes to use up all the buffer and get a sustained ph level, at least prior to adding nutes and giving it to the plants.
After some research I have found that a lot of tap water has built-in buffering capacity due to the dissolved ions. So basically, I add acid, it goes down for a very short while, then ramps right back up to the original ph (or very close to it) because the buffers are binding up the free acid.
If I add acid long enough, eventually the buffers are all bound up, and then I will see sustained ph drop. And THEN I can worry about the roller coaster you mention, Illegal Smile.
I REALLY didn't want to have to deal with RO water and added micronutrients etc, so I'm not happy about this. What I may try is a Brita filter, or maybe a sock full of activated charcoal, to pre-treat my tap water and hopefully take out some of the buffering capacity so I can bring it down from it's "native" 8.3 ph.
This just couldn't be easy, could it? Maybe in my situation it would be easier to go to soil. Dang.
At the very least, for the next reservoir, I will pre-ph the water for however long it takes to use up all the buffer and get a sustained ph level, at least prior to adding nutes and giving it to the plants.