okay, so with
8x Congo Tetras
7x Crimsonspotted Rainbowfish
6x Bandit Corys
6x Albino Corys
6x Kuhli Loaches
20x Cardinal Tetra's

Aqua Advisor says -Your aquarium filtration capacity is satisfactory.

Your aquarium filtration capacity for above selected species is 112%.
Recommended water change schedule: 34% per week.
Your aquarium stocking level is 104%

I like this sort of mix, is there something else though that would work well with these?