So you have
-3 YoYo Loaches
-1 Red Tailed Shark
-1 Pearl Gourami
-7 Serpae Tetras
-6 ScissorTail Rasbora
-5 Brilliant Rasboras
-6 Pearl Danios
Bump you YoYo loach school to six (unless they are a type of species that gets big, I don't know a lot about them off hand).
Your red-tailed shark needs to go. It will get aggressive and start bullying fish.
I would be concerned about have serape tetras and pearl gouramis, since serape tetras are known fin nippers, and the pearl gouramis have long fins and will get bullied to death possibly.
You have enough schools in there already.
Do you know if your nitrate reading is consistent? Do you know what it is right now?
I would move the RTS shark and leave it as is IMO, possibly the serapes too if they become problematic.