Is There Room For Just 2 More Fish?

[xoedusk]

Happy New Year.

I have a question regarding our tank stock/tank space.

Currently we have a 20 US Gallon Long. Filtration is via AquaClear hang on back filter, rated at 20 gallons. Often, though not all of the time, we have 2 of these filters instead of 1 running in the tank (the extra is for quarentining purposes). The tank has been running about 6 months.

The current fish present are:

3 platies
3 panda cories
5 harlequin rasboras
some platy fry, which will eventually be given away once they are old enough.

Do you all think there is room for 2 otocincluses? Sorry for the bad spelling.
If not, what about upping the rasbora or panda count?

EDIT: After doing some more research, I was reminded that they're very sensitive and often die when transported - something I'd rather not happen. But I'd still like your opinion on upping the number of rasboras or pandas?

 

[Fishkrazy1]

I wouldn't recommend otto cats as they are VERY senstive, so I've been told, no actual experience with them... But my recommendation is to get 3 more harlequins... they like to school and the larger the group, the happier they are