hi i have a 40 gallon long and wanted an all labidochromis caeruleus but wondering how many i could stock. My pH from tap is 7.8-8.0 and ill be using crushed coral. There will be rock work and a few plants. What would be the best catfish/savanger to put in there besides a plec? Ill be buying from 1.25"-1.5" just incase compatibilaty issue or size... thnx