I have a pair of kribs in a standard 29 gallon tank. It is moderately planted with several hiding places scattered. I was wondering what other type of fish I would be able to house with the pair. They have not bred yet, but her belly is really purple and some digging is going on. They are pretty shy right now, coming out of hiding seldomly and for seamingly no reason at all. What fish would go well with this pair and assume that they will breed eventually and may become aggressive. Looking for suggestions, thanks.