Ph left too high ?

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Bob999

Member
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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.
 
Z

zebracake

Member
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.
 
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zebracake

Member
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.
 
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Bob999

Member
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
 
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zebracake

Member
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.
 
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Bob999

Member
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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
 
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zebracake

Member
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.
 
Herb & Suds

Herb & Suds

Well-Known Member
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 :leaf:
 
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