Ph level rising.....

Hi guys
Need a bit of help with my ph issue.
Im currently growing 7 plants in dwc, each are in 19L oxypot buckets, with 1 air stone in each, plants are around 6/7 weeks in veg from seed, using shogun nutrients A&B, silicon and katana roots with green emerald calmag.
Growing under 3 lights which are 2 x 600w dual spectrum hps and 1 gavita pro 1000w dual spectrum
Room temps range from 19c - 25c
Water temps with lights on are reaching 21-22c, usually use silver bullet in my res so i never worry about root rot, I'm going to buy some tomorrow.
Humidity 30% -50% using a ram humidifier
Ec/ppm 1.0-1.2
Ph level set at 6-6.2 and rises to 6.8/7 within 24 hours, plants look fine and are healthy drinking flourishing until recently I've noticed a few rust spots which indicates calmag deficiency hence why i started adding calmag supplement, I'm having do PH down daily, I've grown in dwc few a couple years now and have never had this issue, I've read online this is normal but im thinking it's abit of a drastic jump in ph to be "normal" ???

Am i wrong?

Roots are nice and white and strong root mass with no browning.

Any help is appreciated

Its normal bro. Im always adjusting ph down during late stages of veg & up in mid flower stage. But you should set the ph between 5.5 & 6.5 because some minerals like manganese phosphorus & boron are more readily available to the plants at levels below 6.0. So ideally you want to use all the ph range between 5.5 & 6.5

Darkoh69 said:

Its normal bro. Im always adjusting ph down during late stages of veg & up in mid flower stage. But you should set the ph between 5.5 & 6.5 because some minerals like manganese phosphorus & boron are more readily available to the plants at levels below 6.0. So ideally you want to use all the ph range between 5.5 & 6.5
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Thankyou brother appreciate the reply man, like i said though I've been doing it a few years and never had it fluctuate how it does atm but fuck it lol ill carry on doing what im doing respect

All good bro. Yeah it’s weird how it goes up in veg & drops in flower. Its almost like the plants know what they need at different stages & try adjust it themselves its fucked up boggles my mind

There eating more now. How much does the EC drop?
Edit. As said above start at 5.5. Then let rise

myke said:

There eating more now. How much does the EC drop?
Edit. As said above start at 5.5. Then let rise

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The EC doesn't really drop, stays around 1.0-1.2 just the PH rising

Bushbaby11 said:

The EC doesn't really drop, stays around 1.0-1.2 just the PH rising

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Ph going up is a good thing. So keep doing what your doing. Carry on carry on.

myke said:

Ph going up is a good thing. So keep doing what your doing. Carry on carry on.

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Thanks mate