[dwalstad]

I've removed the CO2 injection three weeks ago, maybe the plants need more time to adapt to the new condition

Today (1/7/2023) I started a new thread 'Plants for Low-Tech' in response to your question. You brought up an important issue.

 

[dwalstad]

Very pretty tank! Fish look so healthy and colorful. Very nice selection of community fish.
You seem to have the situation well in hand. No suggestions from me.

 

[dwalstad]

Looks like an improvement! You've got a nice patch of four-leaf clovers and new stem plants coming up on the right.
Kudos for reminding us that plants do better with ammonia than nitrate. (Let plants get the ammonia not nitrifying bacteria!)