A suggestion for very good reasons.
You'll want to move out the dragon goby, for various reasons.
1) they're actually a brackish water fish, meaning they need a salinity level almost half way between full salt water and fresh water. Wild caught in brackish, thrown (not acclimated) into FW
by the supplier, if they survive that, then they get shipped to stores where they are also kept in FW
and rarely survive much less thrive when bought and put into FW
2) they have small eyes as you can see, so feeding them isn't like feeding other fish. They can't really see the food, they just lumber along until them find some. The faster fish will out-eat them.
3) they are slow fish (compared to most) and easily bullied. You have african cichlids mixed with blood parrots (a bad combo by itself) they will both beat up your dragon. (a little research would have told you this)
4) african cichlids like the ones you have, which look like a zebra, a peacock and a kenyi, have different feeding requirements than the goby and the blood parrot. Those specific africans need a herbivorous diet, at the least an omnivorous diet, very low in protein or they will bloat, look up malawi bloat. The blood parrots and the goby need higher protein diets.
5) yes, I have lots of experience with this particular fish (the goby), if you don't believe what I'm saying, please do the research.