CCH20 - PH and PPM Rising

Fam,

Like the title says, the PH and PPM are both rising in my flower room. This is week 1 of flower. Here's a rundown on the situation:

-Large soil plant was cleaned off (mostly, but still a good amount of dirt in the roots) and transplanted into the DWC system (net pots with clay pebbles)
-I forgot to add UC Roots for a 24 hour period after the swap from veg to flower (different rooms)
-On Friday of last week, the PH and PPM started both rising. I immediately pumped the system out and filled it back up with RO water along with 35% H202 @ 15ML per gallon of water. This cycled with the plants for 12 hours. I also used a water wand/pump to wash the plants roots off from the top of the net pots.
-On Saturday things were okay but I noticed the problem was happening again Sunday. So I flushed again with H202 for three hours, repeating the net pot wash 3 more times.
-Today the PH and PPM are still both trending upwards.
- PH is at 6.1 and PPM is at 735. (The plants are very large, 6 week veg)
- Bioceres WP was also used in week 5 of veg to inoculate the plants against aphids and other pests

Any idea what is going on here? I can't figure it out for the life of me.

Thanks Fam.

~Mike

Still having PH problems? You experienced with hydro and hydroclay?
People get PH swings when they use hydroclay and they usually blame it or the dust from it. Mostly it's the fact that hydroclay is PH dependent; it had no PH buffering ability. Sphagnum peat moss, hummus and other "soil" oriented mediums have a PH buffering ability. If you're used to growing in those mediums it will seem like your PH is fucked when you switch to hydro. Real pure water makes it more noticeable. Well water usually has a lot of carbonates and they buffer PH a bit.
PPM rising is likely your plants using water and some PPM. The fluid level will drop and you should maintain a relatively stable level. It'll let you get to know how thirsty your plants are. If you don't top up with water enough the PPM will rise as they use water and some PPMs. Top up with water and the PPMs fall a little bit every day.