Then if probably is the only one i would say leave it since they do clean the tank well i have a couple of them and they do a good job. Just keep an eye on it.
They won't eat any healthy plant material but they might eat stuff thats already dead or dying.
Oh that's super helpful. Where's the best place to get some of those lil guys?
Would my dwarf gouramis, corry cats or bristlenose pleco keep the population down?