I Don't think that will work at all , Mel-O had a 1,000 gallon tank and tried to have a pair of Umbee, festae, and something else and it worked for a little while but then one day that male umbee killed his WC female festae and hurt the male pretty bad ... I know sometimes some people get lucky with some combinations of fish cohabing but Seiously I think the odds would be better to win the lottery then them the pairs of Umbee, festae,Dovi Cohabing in a 150 ... it could work if they are all very young but just saying eventually there would be a world war III in that tank.