Grow Mediums my res pumps are bumping up PH

[lunarman]

I'm doing autopots. I have a powder nute that leaves a bit of sediment. The pumps I've used so far are bumping up pH in the res. Air bubbler and circulating both.\

Is there a pump that does not increase ph? Or should I try a timer on the pump and only turn it on x times per day?

 

[islandgrower]

I'm doing autopots. I have a powder nute that leaves a bit of sediment. The pumps I've used so far are bumping up pH in the res. Air bubbler and circulating both.\

Is there a pump that does not increase ph? Or should I try a timer on the pump and only turn it on x times per day?

I think that would be the best option but I have no experience with that.
When you raise the oxygen concentration in a solution it does make the ph swing .

'Carpe diem et fumum veriditas'

 

[bushmasterar15]

I believe @SPZ did a chart without and with showing the PH fluctuation in his autopot res with an airstone/pump on first grow. I just mixed my nutrients and added them to my res then every few days just gave it a stir.

 

[Heliman]

In terms of water chemistry, what is happening to bump up your Ph with a bubbler is not the oxygen uptake but the removal of Co2 by the bubbling. Thus you will drift to alkaline (Ph up). Generally, changes to O2 levels should not influence Ph.
We get this phenomena all the time when trying to keep live corals at home.....we add supplementary Co2, via a Ph controller to fix it. Cant really say what would work for Cannabis

 

[puggle6]

More info needed.

Base water pH, & EC/ppm/TDS doesn't matter which one.

Nutes used? Lots of bubbles can raise it but a fix shouldn't be hard to find

 

[Hippy_BiotabsF70]

You’ve tried one that just moves the feed around rather than adding air bubbles mate?

I don’t use a pump at all in my res, but that’s got liquid nutes in not powder.

I just give it a shake every morning.

 

[STILLSMOKIN]

Not trying to hijack but are you not using pump or airstones?

 

[KonopCh]

Don't need to use anything in reservoir, you're already bubbling (adding O2) solution if you have airdomes.
Simply disolve dry nutes and forget about it until reservoir is empty.

 

[Ozone69]

I was brainstorming the other day for something to keep a reservoir mixed up for an outdoor pepper garden setup with some Blumats I was contemplating. Probably not doing it this year, so didn't go too far down the rabbit hole, but I was wondering if you might be able to rig up a holder mount for a power drill with long paint mixer attachment set in the res (drill suspended above with mixing bit extending down into res). Put it on a timer to run for one minute every fifteen minutes or something along those lines (depending on how granular a timer you can find).

Anyhow...just a bit of brainstorming I figured I'd toss out there in case you want to run with the idea.

 

[SPZ]

I believe @SPZ did a chart without and with showing the PH fluctuation in his autopot res with an airstone/pump on first grow. I just mixed my nutrients and added them to my res then every few days just gave it a stir.

I did keep track of this for a while. I found that an air stone in the res causes the pH to climb more quickly than an immersion pump or no pump.

I agree that no pump is required. My last grow produced 13 oz on a single plant with no pump in the res. I just stir it with a big serving spoon whenever I top it off.