Hard Rock Aquatics

@Tony s Thank you for your reply. I'm going to ask around my local fish stores about Multis. I have quite a few within easy delivery distance but far enough apart that they have different customer bases. I'll also ask what else they'd be interested in.

Hi All. I'm in the UK. I live in an area that has liquid rock water. Since leaving the EU, reliable, healthy imports have become difficult and more expensive, so I'm starting my own little home business specifically breeding fish for hard water. I have a 90g tank: 4ft long x 2ft tall x18" deep. I also have a 4ft low boy. I have two ideas for breeding stock: 1: 90g with multis plus one or two other Tanganyikan Cichlids to occupy middle and top. 2: 90g with something else and low boy for multis only. My questions are, which option would you choose and what other cichlids would be suitable/ profitable?