Stocking Options?

[eklikewhoa]

breeding pair of zebra plecos

Those are better off in groups, and 20L wouldn't be enough.

Maybe a grow out tank... then again my group wasn't that well off in a 20L

[Ballinxalex]

Petro growout tank !!

[barberking12]

Those are better off in groups, and 20L wouldn't be enough.

Maybe a grow out tank... then again my group wasn't that well off in a 20L

i didnt know that. maybe they are not a good choice then lol

[eklikewhoa]

Really boring fish... It would be just as active as the tank sits now.

[mnemenoi]

As it sits now, I imagine its sand, rocks, and a higher Ph/TDS. Psuedomugals (Blue Eyes) and dwarf rainbows would do well in it. Some of the Micro Ctenopomas would work, possibly with a few african barbs and Microsynodontis. I have yet to see anyone try a tank like that out and think it would be interesting. The harder water rules out most Southeast Asian and South American fish that have softer requirements. Sulawesi shrimp could work with Tylomelania snails. Most of the oddball gobies and Stiphodens hail from water near those ranges as well. Hillstreams would work with a bit more current. Maybe Honduran Red Points (?, I think a pair might fit as they are about the size of convicts though a bit more passive). Just a few ideas I can think of without too much alteration from your current set up