I keep four yoyo loaches in my 75gal. They'll eat ANYTHING really. I feed them a variety diet of frozen bloodworms, brine shrimp, daphnia, mysis, spirulina small pellets and wafers, peas, cucumbers, zuchini. I've even feed them bananas before!
Like ewurm said they like to be kept in shoals and will really be happy with any loach. They will establish a "pecking" order and when doing so will turn pale almost white. When accumulating to main tank they will hide a lot until they feel comfortable to come out, and they WILL i'll repeat WILL go up into power filters so if your filter is open and they can fit they'll be in your filter! In my tank I have some "L" tubed PVC piping thats covered under the sand that they call home, but will sleep pretty much anywhere. They love to sleep on their sides as well so don't be worried if you see it on its side just catching some Z's.
Here some pics of mine Gotta LOVE'M!
J