disconnect and stop using the co2 and stop dosing ferts. Then do a 30% water change see how it goes. How often are you dosing ferts and what are you dosing?
KarlTH and Bro thanks. I see your points. Let me look into these issues. I did posted another earlier thread on correcting my lighting and I also need a test kit.
Will let you know if things are improving.
Neon yes I am. I had been in that nightmare and that's why I do not want to see things die any more even fish/plants. That's was the result of the cold war and Cambodia got a hot war.