Kribensis cichlid question?

Lake Tanganykan shell dwellers are excellent fish though you have several issues here. Lake Tanganyka is composed of very hard water and the fish need hard water to survive and thrive. Neon Tetras are soft water fish are will not survive in Hard water and visa versa for the shell dwellers. Corys are soft water as well though more tolerant than neons. The first thing you should do is contact your municipal water source and get a report on the water being distributed to your home. Purchase fish that match these parameters. Shell Dwellers also need to live in colonies and don't do well individually. If you want some additional cichlid info check out our website www.gcca.net