most dwarf cichlids like lower to neutral ph specific names? try the dicrossus (checkerboard cichlids) they like ph 6ish, apistogramma's from 5.5 to 7.5, rams 6.5 to 8 that should give you a good start. with any of these fish you can add small tetra's, guppies etc with little to no problems as they are gopod dither fish