Fifteen captive-bred dwarf white isopods, a tiny and plant-safe clean-up crew. They suit small jars and bowls where a larger isopod would look out of scale.
Like other clean-up crews, they feed on decaying material in the build. They are a useful addition to a bioactive setup that already has plants. Add them to a settled build with some leaf debris for them to work on, and keep the build's moisture in mind. Their small size means they can be hard to see at first.