Sand for loaches?
I've begun planning for a 40g setup I will be starting in a few months. I've read in a few places that loaches like sand more than gravel, and I'll be stocking at least 5 yo yo loaches and maybe some others.
So I guess I have 2 questions here: Is sand necessary for loaches? And assuming it is, could I do a gravel base and sand on top to save some $$$? (I already have enough gravel from a previous setup of this tank.)
Thanks for your help!