Hello everyone, some updates:
I took of the lid of the reactor, and cleaned gently thr probe hole, and in/out of the reactor.
Also, I turned on the recirculating pump when the lid is off for few seconds- the pump work in proper way.
I check that the reactor tubing is installed I proper way .
I took off GEO check valve , and connected the reactor directly to GLA counter bubbles.
PSI pressure on the left clock of the regulator ois at 8 to 10 PSI.
1 bubble every 3 seconds.
turned kamoer pump at 100 ml/minute for 1 hour.
1 hour later , I turned on the recirculating pump.
It took 6 hours to get from 7.8 to 7.15
The ph don't get down of 7.15
Bubbles are still building up in the top pf the reactor (some of said that it doesn't matter anyway)
I don't know if its the real real reading or not , but that is the situation right now.
I'm getting today my milwaukee MC122 ph controller and will use his ph probe , to see if there is any change.
Here is the graph of ph electrode