clown killifish

Hey all, about two weeks ago I've purchased 8 Clown killifish for my 20L, 2 year established tank with a few neocaridina, I could not quarantine them because my QT was taken up that same day by a friends sick beta fish (who is fine now :D), the store did not want to keep the killi's any longer...

im considering the following stock for my ten: 1-2x gbr 6-8x clown killi 1x golden apple snail 2x nerite snail 3-6x amano shrimp This seems ok to me. id like some outside opinions, however, so would this work? Ive asked in a few other places already, but i figured id ask here too as results...