What did my plants have an issue???

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My PH pen is absolutely OK... I test today the Ph sulolution 4.0 and 6.9 and the pen was correct!

Today was watering time and I test also the water nutrients mix and the Ph was 5.9 that's way to low know I think where the problems comes and gets worse i try to tell my Theorie.

Bevor Day 30 my plants are perfect Happy I water that time with only with litte Grow Nutes in my water 2ml /l the Ph was I think in the 6 range because tap water is 6.4 and nutrients take the Ph down to maybe 6.2... Good Ph for Vege! After the final Strech the plants are hungry more and more to bloom Nutes so I put bloom Nutes also to the Mix and what's happening the Ph goes more down and the Ph was more and more in a wrong range to get all the nutrients they need... I though it was a deficiencie and put more bloom Nutes to the water and the Ph drops much deeper maybe under 5.8 that is hydro range so that's my Theorie was happens.. What are you think guys???


I water today with 6.8 i put Ph up in.. The runoff was 6.3 much better for know...
 
:thumbsup: good news indeed! ... if your water is that low pH, it sounds very soft, meaning low mineral content ppm,... as such, it'll shift more easily in pH because those buffering pH minerals (mainly CaCO3),... Feeds are acidic for sure,... acidic soil is fine for most micros, they tend to lock out under more alkaline pH 6.8+, but P and some others can start to lock out in low 6's/high 5's,..
soil.jpg
 
When using LED always load cal mag into every feeding. As a rule of thumb!
 
:thumbsup: good news indeed! ... if your water is that low pH, it sounds very soft, meaning low mineral content ppm,... as such, it'll shift more easily in pH because those buffering pH minerals (mainly CaCO3),... Feeds are acidic for sure,... acidic soil is fine for most micros, they tend to lock out under more alkaline pH 6.8+, but P and some others can start to lock out in low 6's/high 5's,..
View attachment 848935



6.8 is to High?? I change to 6.8 so better 6.5?
 
no mate, actual in-pot pH at 6.8 would be a bit too high,... but you have run-off coming out more acidic than what went in, so the pot is acidic for sure, maybe too acidic.... measuring straight run-off, from pH adjusted water or nute solution especially will not give accurate in-pot pH,...
 
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