Ph Flux

[hazzy]

I have been using advanced nutrients for 2 grows and have constant drop in ph.
its 2 DWC's 5gal. 2 airstones each bucket . average water temp 67-70 , scrog .when I change nutes ph is ok for about 2 days but then drops into mid 4's .Can't see the roots on this grow because the screen but I had same problem last grow and roots were good , off white. and it also burns my leaves and this time I have been keeping ppm's in the mid 700's this time but they still are burning . due to my job I have to water about 1 hr untill lights out.2 weeks left on this grow but I sure would like to know what I am doing wrong so next grow goes well. HELP

 

[Kaninchen]

You'll have to clarify. What is your input PPM and PH and what do you read two days later?

 

[StandingRock]

If it's Avanced Ph perfect they've told me it's very hard to get an accurate ph on it because of all the buffers. Ph perfect also provides a higher range of uptake from 4.5 or so all the way up to 8 I believe.

 

[PhatNuggz]

pH swings are 'normal' during mid-flower on. I have to adjust mine daily. What stage are you in?

Also feeding at night is not a good idea. The plants need light to process the food

 

[Cultivate420]

If it's Avanced Ph perfect they've told me it's very hard to get an accurate ph on it because of all the buffers. Ph perfect also provides a higher range of uptake from 4.5 or so all the way up to 8 I believe.

Really? That is a huge range im using AD made for coco so far im loving it.

 

[StandingRock]

Really? That is a huge range im using AD made for coco so far im loving it.

I could be off by half or one ph point in either direction. It's been a while since I talked to them but I'm positive it's 4.5/5 up to 8/9.