Ph left too high ?

My ph keeps going from 5.8 to 7 overnight everytime I adjust. I'm using ph down from biobizz but it only turns down temporarily I'm waiting to get a new bottle of ph down by growth technology containing Orthophosphoric acid.
Is the ph being to high causing the leaf to be like this or is this a different issue.

Looks like a potassium deficiency but most likely caused by the high ph. How much ec or ppm are you feeding? I've heard that underfeeding can cause the ph to rise but idk for sure. I've only dealt with ph going down and that's caused by too much potassium or overfeeding.

Its on 0.8 ec atm

Its been 20 days in veg and I topped 2 days ago

You could try bumping up the ec a little bit. How are the roots looking? I think bacteria can cause the ph to rise. You should use a beneficial bacteria or add a little peroxide once a week or so. They look good for 20 days in veg.

I got abit of root Rot when the water temp went to 26 degrees but I installed a chiller and keep on 20 and added orca bacteria the roots are now white and recovered nicely

What should I bump the ec to

0.9 or 1 should be fine. What does that translate to in ppm? My meter measures ppm. At this stage I'm usually around 600-700 ppm but some strains eat more than others.

My rdwc is 125 litres and I'm using gh trio feed which is recommended 0.6ml per litre of all 3 bottles of bloom gro and micro. How many would I out in to increase ec just by 0.2 more

How many threads do you need for the same thing, ?

Are you on the 500, 640, or 700 scale? Either way that's lower than what I normally feed. I don't use premixed liquid nutrients so idk how much you'll need to get it up.

I duno im using ec 0.8 What liquid nutrients do you use

Are you using tap water or RO? Using tap would explain your ph drift.

I'm using ro water

I could be wrong but didn’t I read in one of your threads you were using some form of silica ?
I ended up with drifting ph issues until I dumped it
Just a wild guess

Herb & Suds said:

I could be wrong but didn’t I read in one of your threads you were using some form of silica ?
I ended up with drifting ph issues until I dumped it
Just a wild guess

Click to expand...

I was about to ask the same thing. That's one of the reasons I use mono-silicic acid when I add silica. It's ph neutral.

Yh I'm using plant magic silicon

Yh I'm using plant magic silicon

Herb & Suds said:

I could be wrong but didn’t I read in one of your threads you were using some form of silica ?
I ended up with drifting ph issues until I dumped it
Just a wild guess

Click to expand...

Plant magic Hydro silicon*