Ok, here's the story. I decided to up my light on my 26 bow from the factory 15w hood to a 65w compact. Got the light everything was good. PH was low for some reason or another 6.5. Went to LFS go PH buffer(what a nightmare!) Added buffer ph at 7 green water 2 days later(also added planttabs fert and plantgro). Ok, found that phosphates were high off the charts! 5ppm in tap plus whatever the ph buffer added. Ok, so I bought a tap water filter and added phoszorb to whisper 40 filter. Still green water 1 week later no phosphates. Decided I needed co2, built co2 reactor with crude co2 bell, and did 50% water change. Green water 1 week later. Got mad and added algaefix. Still green but i could just barely make out the back. KH at 1 degrees added some baking soda, now at 2.5, PH still at 7. Two days later decided ,ok, bell must not be effective enough. Built Barr reactor (kudos to Tom for that by they way! what a inovative design) It's been running for 1 day with still no ph drop.

1. Is it possible that i'm not reading the PH drop from CO2 due to the remaining PH buffer in the water? Or is the buffer bonding with the CO2 and making it unreachable by the plants?

no ammonia, nitrites reading with test kit.

2. If I am getting CO2 should I see the green water subside?