It's hard to say from your statement what is causing your issues. With most new tanks the #1 culprit is usually light. You also stated you stopped dosing and cut co2, did you cut back on your lighting during this time. What kind of light are you running and for how long? What are your co2 levels? Need more details.
At the time the light remained the same. A Finnex Planted+ light that is on for 7 hours a day. The duration in which its on is still 7 hours. CO2 is at 30 ppm.