African haps are large open water african cichlids...so now they will have more room..
I already made a list of plants...but here. jungle val, java ferns (lace and phillipine) anubias sp., and crypts.
so basically low light, easy to grow plants
it could be limestone...it probably wont be all that reactive , but i'll check, even if it is, the fish will love it, and the val and ferns will be fine too.