I have a 54L (14.3gal) tank with 6 Dicrossus filamentosus. I intend to breed them so my water is quite soft and acid. I intend to bring ph range to 5.0. So my question goes to on what small dewlers should i keep with them? I was thinking about dwarf pencilfish but it disturbs me, as they aren't that low ph tolerant. So what do you people sudgest?