stocking question

[slroo]

Hi everyone! New here, have been visiting different forums and getting conflicting advice. So here's my question:

Can I add 2 more black skirt tetras, 2 more rainbows, and 2 more cories in order to have complete schools of each, and yet not be overstocked?
They all seem to hang out at the middle/bottom, so not sure if that would be overcrowding.

55gallon
4 black skirt tetras
4 boesemani rainbows 3 zebra danios
1 spotted raphael cat
4 peppered cories
1 albino bristlenose pleco

 

[QTOFFER]

Welcome to AA, slroo!

How long has the tank been set up? You're certain that it's cycled?

The new additions would bring you to your stocking limit.
With a fully stocked tank, it would be important to do regular water changes and have an efficient filtration system.

 

[slroo]

Thanks!
The tank has been set up since mid Jan and is fully cycled. Water parameters are below. Would it be okay to skip adding 2 more of each of the above and instead add a school of something that would be top-swimmers? Can you suggest something colorful?

PH 7.2
Amm 0
Nitrite 0
Nitrate 10