Yup I know about the pleco, even the small ones are too big lol
I still haven't stocked it, just has my betta in there. I'm trying to find some ghost shrimp but would you believe none of the pets stores stock them, shocking lol.
If I can't find the shrimp then I've been thinking of maybe 3 guppies some have success with their bettas while others don't, so im still playing with the idea also I have heard that glolight tetras can live in 20litre tanks so I could get some of those and also there are pygmy corys which I have wanted for a while. Just got to decide with which one to go with now lol.