Also do you have any ideas for clown knife tank mates?You could also do an invert tank.
Oh I know. The clown knife is in a 75 gallon, upgrading to a 120 gallon once he hits 7”. Right now he’s around 5”Shelldwellers, Telmatochromis, oddball livebearers and other killies (ex. Xiphophorus Montezumae) Elassoma sunfish, Microctenapomas, the smaller hatchetfish, pencilfish, headstander and SA upside down catfish, pea puffers, a Julidiochromis transcriptus group (maybe). You could keep a lone Krib or convict, as a wet pet, but it's a little small for a pair.
A clown knife would grow longer than the 10g LOL.