I have 7 neon tetras in my 54l tank currently. My filter is 110l and I do 40% water changes every week.
I wanted to introduce:
3 more neon tetras
10 harlequin rasboras
4 pygmy cory's or oto's
Is this overstocked? And will the new neons school easily with the others fine, idk how it works lol.
Sorry I'm a complete newbie
Any suggestions and advice are welcome