that is a reallly nice setup you have. What ferts are you using? That is also a cool cat that you have...
One of the most functional critters that i always suggest to friends of mine with planted tanks are a small school of otto cat fish.. they are great at keeping algae counts low and are not harsh on your plants, unlike plecos and CAE's. I was also very partial to Dwarf cichlids, just because they were such fiesty fish that were always active and amusing to watch.