For what it is worth, my plants don’t seem to suffer with raw water that has similar numbers.
3 Likes
You said that but i still must know “why”
Seems at least with my water if i add pH down, it just goes right back to an unreasonably high pH in just a short time. I realized this after i started growing hydro tomatoes. It does it in my soil as well but its harder to notice with the soil buffering. My quest to find stable water and the frustration involved is the point of all this. Whatever is working for you by all means keep it up!
@merlin44 oh I agree my water at 350-400 ppm does great for my plants have no clue whats in it, I do know some iron, and calcium but it works and I adjust to it, I dont worry about it alls good and I make it work. We are on a well and a river in the front yard and a pond off to the side. Our well is maybe 100 ft and river level from well is 50’
2 Likes
Maybe my next run I’ll try to work with my tap water and see what happens
2 Likes
What nute line are you using with that tap water
1 Like
Jacks in one tent and Mega crop in other, coco, using autopots.
1 Like
So I ran about 5 gallons of ro water last night let it sit a couple hours the put some air stones with a pump in there for about an hour. After aeration the pH jumped up from 9.4 to over 10! (I know, invalid ) then added silica and cal/mag and 1/3 tsp pH down and let it sit overnight. This morning the pH was back up to 9.7 to ten! I don’t know what to think about this. But Im guessing that there is something in my water supply that is interfering with my attempts at stabilizing pH. But it is interesting what happened after aeration!! I wonder if it happens with the unfiltered tap water as well?!
1 Like
Just to be clear, my concern has little if anything to do with the content of the water as much as it has to do with getting a semi stable pH. Even my soil rises to almost 8! Seems that most are fighting low pH
1 Like
You are calibrating your pen as well? Just a thought.
2 Likes
That is correct
2 Likes
Thats crazy. We have well water. Sometimes I use the dehumidifier water. Both come in around 7.5. If I mix then let sit, it’ll raise maybe .5. Its so frustrating because it’s so crucial as well.
1 Like
Try using white vinegar to bring it down and stabilize
1 Like
I was doing that as well. I think baking soda will raise it as well?
Couldn’t hurt to try i suppose. But it seems adding ph down would achieve the same end. Ugh! Chemistry 
3 Likes
It will. I used vinegar all last summer.
2 Likes
I used to drive myself crazy trying to adjust pH but not anymore.
I run a RDWC setup.
I use the full product libe from Advanced Nutrients.
I go precisely by their feeding app except for the first week after transferring them to the buckets. That’s when I only use 50% of the recommended volume.
I only monitor conductivity. I threw my pH in the trash three years ago and have not regretted it.
1 Like
So, had to walk away for a minute… decided to start again. This time i decided to NOT agitate before hand! In my situation it wrecked it (in a bad way🤓).
5 gallon bucket ro water set overnight (not sure that’s necessary) then adding about a tablespoon of cal/mag put it about 7.4. Did not measure before. After adding my nutes at the proper TDS it came down to about 6.2-6.3. Pretty close for my uses.
So i have achieved my goal of creating a water that doesn’t need to be pH corrected, but it
seems my ignorance had me chasing rabbits. 
not the first time 
.
I post this only in case anyone else runs into these questions in their quest for perfect weed🎄
2 Likes
Wassup growmie! I know I’m late and it seems you solved your problem, but if you still need an easier way to get good water, I have this 10 stage enviro water filter and it’s SO easy to set up, connects to any sink via the faucet and it basically makes distilled water! And they last a year or 1500 gallons, makes my tap water taste delicious and last time I checked, the pH was a clean 7 for a whole year when I did a little experiment.
1 Like