This is the most reliable place there is for information on Loaches
http://www.loaches.com/
Everything you have is compatible with them. They prefer to be in groups and I would recommend three of them but that might over stock your tank as they can get at least five inches or a little larger. They are active and curious fish but active doesn't mean aggressive.
If your buying them just to solve a problem it might be better to solve the problem another way. If you truly only want them for this reason you would be stuck with several fish you don't want after the problem is fixed. Hope that helps.
carol