Stabilizing my PH

First time DWC grower here. Got two WW seedlings in a 1 gallon container; I'll go bigger when the plants mature a little more. I'm really impressed with how much they've grown in a week, but there's one thing that concerns me, and that is a fluctuating PH. Last night I added some SensiGrow A+B to 450ppm, then PH'd to 5.8. I'm starting with RO water with PH exactly 7.

I just checked PH and it's 7. Is there some way I can stabilize the PH?

What did you use to lower the PH?

yaunch77 said:

What did you use to lower the PH?

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PH down. Bought crystalized from Walmart.

Ph is harder to maintain in hydro the smaller the res is. I'm using a 5gal bucket right now to feed 7 plants in a RDWC and the ph needs adjusted every couple days.

i got 30l pots and a 30l res and i adjust my ph every 2 days now, fuck having to do it every couple of hours

My 5/6 gallon dwcs need adjusting every four days or so. The ph stabalizes as the plant matures (FROM WHAT I HAVE EXPERIENCED )

Hmm. After some research it looks like ph rising is a normal byproduct of plant feeding. I think I'll just upgrade to a bigger res.