To someone above cories dont really dig, they just sift around the very very top of the substrate.
I think that if its to keep the substrate turned over, then malaysian trumpet snails are your best bet.
I have candy striped gobies which bury themselves from time to time but i dont think many fish really move through the sand, and if your substrate is dirty then its probably not a good idea anyway.
I think that if its to keep the substrate turned over, then malaysian trumpet snails are your best bet.
I have candy striped gobies which bury themselves from time to time but i dont think many fish really move through the sand, and if your substrate is dirty then its probably not a good idea anyway.