These guys are great fish. It may work out in your tank if you only have one since he won't have much to do anyway, but as mentioned they can be pretty aggressive in pairs. Personally I don't think it's a very good addition to your tank at all since they have quite the opposite water requirements as Rams (for best long term health and breeding a PH of 8-9 is most desirable, and a PH of below 7.5 will affect the fishes health directly over time). Shells are important and escargo, Apple snail, the authentic Neothauma snail, or anything similar can be used. They do interact directly with the substrate and sand, while not crucial, is very important if you want the most natural behavior out of them.
In your case all you can do is set up a small area for a couple of shells and hope all the fish work it out, but keep a close eye on things and make sure there's no stress between the very different cichlids. Ideally to get the most out of these fish a pair would be given their own tank of 10-20 gallons with a couple inches of sand and several shells, with which the couple can interact, dig, redecorate, and raise a 'family'. Then you can truly appreciate what these little guys have to offer.
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