pH issues

Greenthumbgrower1986

Well-Known Member
Hi all, please be nice I'm new to dwc.
Currently growing a lemon berry photo in an oxypot under 2 Mars ts1000. Temps are a steady 25°c and Rh is 56%. I filled oxypot to desired level with tap water, added some neutralize from ecothrive and let it bubble for 1hr then mixed in 5ml of vita link a and 5ml vita link b for hard water. I then phd the solution to 5.5 and let it bubble for another hour. The pH rose slightly to 6.8 so I added a bit more pH down. The ppm of solution is 450ppm and water temp is 22°c. The problem I'm having is that every hour or so the pH is raising to around 7. Currently having to pH down every hour or so. What am I doing wrong?
 

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Alphonso OG

Well-Known Member
What size is the res? Bigger res will have a more stable ph. Also Are you adding any thing to sterilize your res?
 

Alphonso OG

Well-Known Member
Ph will also rise with from the air stones agitating the water.

 

Greenthumbgrower1986

Well-Known Member
Ph will also rise with from the air stones agitating the water.

I bought it as a kit. They are called the oxypot. I would assume the airstone would be the correct size for the pot. I believe it's a 2inch ball. https://www.growell.co.uk/growing-systems/hydroponics-growing-systems/iws-oxy-pot.html
 

Greenthumbgrower1986

Well-Known Member
I have now tried everything and can say I give up with dwc. I've done a few tests and still none the wiser. I thought it may be the clay pebbles raising pH so I put some in a jug of water with a jug of plain water next to it. Left it 24hrs and both jugs still had the same pH.
 

ҖҗlegilizeitҗҖ

Well-Known Member
Get RO water.
Regardless if you use hydro or coco.
This is so important, it will save you so many headaches.
This RO cost me $145, plus $50 in other parts and connections. Total investment was $200 or so. Connected it to a float in a 35g rubbermaid garbage with a pvc spicket at the bottom. Works amazing, and water is at 0 ppm. (Also ran a line to the kitchen for great drinking water)


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Greenthumbgrower1986

Well-Known Member
Get RO water.
Regardless if you use hydro or coco.
This is so important, it will save you so many headaches.
This RO cost me $145, plus $50 in other parts and connections. Total investment was $200 or so. Connected it to a float in a 35g rubbermaid garbage with a pvc spicket at the bottom. Works amazing, and water is at 0 ppm. (Also ran a line to the kitchen for great drinking water)


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I wish I could, I just don't have space, I live in a 1 bed 1st floor flat with no garden or outside space
 

ҖҗlegilizeitҗҖ

Well-Known Member
I wish I could, I just don't have space, I live in a 1 bed 1st floor flat with no garden or outside space
The ro is extreamly compact and simple, works right on a countertop even, you can screw it onto a faucet to make water, then unscrew it and put it away if you wanted.
I have mine mounted on the wall right in the grow room, connected to a copper pipe I cut, and added a "quick connect" garden hose attachment. Works great, and only took me about an hour to set up. Trust me, its really simple, I have trouble believing you couldn't do it
Its used indoors so im not sure why you would need a garden or outdoor space
 
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