Quote Originally Posted by Passage to Indica
Hi all. I'm about 3 weeks into vegging and my girls look great. Lush and healthy. I've been experiencing slight drops in pH like from 6.0 to 5.7 or 5.7 to 5.5 during the light cycle. I'm not sure what it means or if it's fine or what.

TDS at the last rez change (5 days ago) was about 1700 with all nutes and supplements combined. The plants took very well to it. TDS today is 1370 so the plants are using up the nutes. Usually when plants use nutes the pH tends to increase a bit, not decrease, or so I have read.

I have a feeling the plants are almost "self-adjusting" themselves to their desired pH level. I am going to ask the seed breeder what he thinks.

What do you guys think? Is it cause for concern?
Two things. First, 5.5 and 5.8 are all within the desired hydro pH level, everyone has their own reasons and Im sure some plants like different things. That being said, pH that is constantly moving up and down will not treat the plants as best as having something more solid. Can you use a larger reservoir? Can you find water that starts out with a better pH? What are you pHing the water with? Are you pHing down or up? The down turned leaves looks to me like too high or too low of pH or high rez temps. 6.0 pH is too high. I let mine float around 5.7-5.8, but then again its easier for me with a larger rez.
Racerx Reviewed by Racerx on . Drop in pH..but good growth...???? Hi all. I'm about 3 weeks into vegging and my girls look great. Lush and healthy. I've been experiencing slight drops in pH like from 6.0 to 5.7 or 5.7 to 5.5 during the light cycle. I'm not sure what it means or if it's fine or what. TDS at the last rez change (5 days ago) was about 1700 with all nutes and supplements combined. The plants took very well to it. TDS today is 1370 so the plants are using up the nutes. Usually when plants use nutes the pH tends to increase a bit, not Rating: 5