martyshoemaker
Well-Known Member
I took my ppm's b4 adding ph up. it was 400ppm then I added the ph up to get the ph right and then took the ppm again. It was 900ppm afterwards! Is this normal or what's up?
I took my ppm's b4 adding ph up. it was 400ppm then I added the ph up to get the ph right and then took the ppm again. It was 900ppm afterwards! Is this normal or what's up?
Marty and Jovani420 whats up fellas. Im so glad ta hear that Im not the only one experiencing this! My PPMs have recently been jumping from 12-1300 to 16-1700 and its been confusing the hell outta me for the past week! It just dawned on me yesterday that the only thing Ive added to my res is PH down but everybody keeps tellin me that PH adjusters dont have any affect on PPMs. So I did a lil experiment... I took a glass full of pure RO water with a PPM of 10 and added about 3 drops of PH down. Then I stired it up, let it sit for a minute and tested it again. The PPMs were over 100! I added another 10-15 drops and the PPMs shot up to 750! So either Im completely insane or PH down does increase your PPMs, and it increases it a lot too! And I use the liquid so it obviously doesnt matter whether it powder or liquid Marty.Im using gh ph up and down and it does effect my ppm and i know my nutra dp tri meter is on point so i have the same problem
Marty and Jovani420 whats up fellas. Im so glad ta hear that Im not the only one experiencing this! My PPMs have recently been jumping from 12-1300 to 16-1700 and its been confusing the hell outta me for the past week! It just dawned on me yesterday that the only thing Ive added to my res is PH down but everybody keeps tellin me that PH adjusters dont have any affect on PPMs. So I did a lil experiment... I took a glass full of pure RO water with a PPM of 10 and added about 3 drops of PH down. Then I stired it up, let it sit for a minute and tested it again. The PPMs were over 100! I added another 10-15 drops and the PPMs shot up to 750! So either Im completely insane or PH down does increase your PPMs, and it increases it a lot too! And I use the liquid so it obviously doesnt matter whether it powder or liquid Marty.
Im just wondering if this increase in PPMs will affect my plants at all? I mean I wouldnt think it would cause over feeding since the extra PPMs arent from nutrients ya know???
Anybody know anything about this at all? Cause this has got me stumped!
I have the exact same trimeter, same scenario over here.Im using gh ph up and down and it does effect my ppm and i know my nutra dp tri meter is on point so i have the same problem
yeah I have 2ppm readers and this isn’t the problem. Also I’m confused how you’re saying your reader was just calibrated wrong and that that was the problem. But you said it showed 0 for RO water and then a high number after adding ph up/down. How is that a meter calibration problem. I also don’t understand how this thread never got answered. I am using ph up and it is changing my ppm reading drastically. Calibration has nothing to do with it.figured it out..... went to my local hydro shop, and yes I normaly wait at least one hour to check (40gal res)
check your ppm meter ... I had calibrated mine with the wrong TDS solution! I have a Oakton PPm meter and i was sold HANA TDS solution. The Correct calibration solution for Oakton meters has nickle in it... so i would suggest having it checked out from your guys at the hydro store... if you have one.. if not, call your manufacture and find out if they are compatible....