Is Tank Fully Stocked

[freshwaterfishlover]

Is my tank fully stocked or is there more room. 20g/76L

Whisper 40
Marineland 100w Submergable heater
Gravel
Big Rock

4 Honey Dwarf Gourami
6 Bronze Cory Catfish
1 Mystery Snail
1 Trapdor Snail
2 Huge Mussels

 

[rocknurworld2006]

you could probably get a small shoal of say neons or harlequins about 6