Just thought I'd share my dirty invert and fry tank. It has been running for about a year. In picture 2 there are some alternate colour neocaridina that came from my RCS. They look like blue rili. Inhabitants are: Ramshorn snails (Many pearl shell peach body - should probably be in a separate tank!) Mini ramshorns Trumpet snails RCS Scuds CPD fry Geophagus Steindachneri fry The marimo balls have lots of scuds burrowed so you can pick them out and shake them off into a big tank, give it a squeeze then put it back in its home. They mostly eat cucumber slices, and tetra crusta menu. I don't have a regular water change schedule, sometimes it has been months between.