60l so that's a 15 gallon were talkin about.
Cherry barbs are Pretty, Small & easy to raise young from, Just need lots of Java moss for the eggs and young to hide.
White clouds are really neat too, and easy to get spawning's from. java moss is also good for the young & eggs.
I have a 15 here with just Cherry shrimp in it.
Have another I keep my adult mollies into that I plan on keeping young from,
Watersprite or floating mats are good, But you will need a bigger tank to transfer the young too once a few weeks old, mollies can produce big drops at least 100 and the fry are born much bigger than a guppy fry.