Raising the ph of soil after the fact

[AppleFarmer]

I am about 3 weeks into flower of Chimeras MentalFloss and I've just started to get a midgrade Mg def with with a hint of Cal troubles too. I am using FFOF soil cut with perlite and have been using FloraNova Bloom as my main flowering nute. I've been on a water-water feed schedule, with the feed days around 1000ppm total with all additives(LK, FF beastie bloom, cannazym)
The ph of my nutes right after mixing is around 5.4. I usually have to add 10-18ml of GH ph up to get it around 6.4, this is in 5 gallons of water.

I was surprised to see the def staring because the FloraNova has a good amount of Cal and Mag, so I decided to check the run off of the worst plant. It was at 5.5. Which, I believe, is why the Cal an Mg have locked out.

My questions for you, my fellow heads, is what can I do to raise the ph of my soil back to acceptable levels? I can't flush because it is unrealistic with the number of plants I have(40 in 3 gal pots) On my plain water days can I just water with a higher ph, say around 7.5 and cross my fingers.
Also being that there is plenty of cal and mg in the soil that the plants can't get to, would it be okay to foliar feed with calmag+ and some penetrator, to give them what they want but can't access via roots, or will this just make a bad situation worse?
AF

An afterthought. Why would the PH of the soil be going down like this? Could it be from the FN and it's ph buffering abilities, meaning I raise it up to 6.4 from 5.4 and after a few hours it just buffers it self back to ideal Hydro ph. wtf?
I don't have a current pic of the plants but here is a shot from a week ago so you can see what I am working with.

 

[HeadyPete]

Hey

OF is supposed to be buffered. You need to raise your fert ph higher to bring your soil up. Microbial action will drop ph in soil, the more food you feed, the more microbes breakin it down. MJ will also suck up the cal and mag during bloom and some strains more than others. Molasses is a great natural calmag substitute. Cheap, just as much cal and mag + iron and carbs to feed the microbes and your plants. Great stuff.

 

[GoldenCloud]

I am about 3 weeks into flower of Chimeras MentalFloss and I've just started to get the a midgrade Mg def with with a hint of Cal troubles too. I am using FFOF soil cut with perlite and have been using FloraNova Bloom as my main flowering nute. I've been on a water-water feed schedule, with the feed days around 1000ppm total with all additives(LK, FF beastie bloom, cannazym)
The ph of my nutes right after mixing is around 5.4. I usually have to add 10-18ml of GH ph up to get it around 6.4, this is in 5 gallons of water.

I was surprised to see the def staring because the FloraNova has a good amount of Cal and Mag, so I decided to check the run off of the worst plant. It was at 5.5. Which, I believe, is why the Cal an Mg have locked out.

My questions for you, my fellow heads, is what can I do to raise the ph of my soil back to acceptable levels? I can't flush because it is unrealistic with the number of plants I have(40 in 3 gal pots) On my plain water days can I just water with a higher ph, say around 7.5 and cross my fingers.
Also being that there is plenty of cal and mg in the soil that the plants can't get to, would it be okay to foliar feed with calmag+ and some penetrator, to give what they want but can't accesss via roots, or will this just make a bad situation worse?
AF

An afterthought. Why would the PH of the soil be going down like this? Could it be from the FN and it's ph buffering abilities, meaning I raise it up to 6.4 from 5.4 and after a few hours it just buffers it self back to ideal Hydro ph. wtf?
Idon't have a currnet pic of the plants but here is a shot from a week ago so you can see what I am working with.

BUMP! I have the same question...... good thread here

 

[AppleFarmer]

could the cannazym be the culprit? it was the first time i feed them it? maybe the breakdown off all the dead root material dropped the ph.

 

[AppleFarmer]

I foliar fed some cal mag+(.5ml a Ltr) with some penetrator tonight. We'll see how they react.
af

 

[planted1]

I would use hydrated lime to give it a spike up a little bit, see how your plants respond. or you could work mareyl into your soil its gotta neutral ph help bring your ph up a bit naturally!

 

[StarGatherer]

I ran into a similar problem once before with peat moss.Is it possible to dissolve lime in water to get it into the soil? Or is a overhaul transplant into buffered soil the answer?