Woohoo! another michigander
As for the white lab, it's either a go big or go home proposition with these types of fish.
The white lab is a Mbuna which are some of the most aggressive freshwater fish around. Because of this they need to be stocked very specifically.
1 - 55g minimum Because of how big they get and the need to overstock the tank with a group of them it's recommended to have no less than a 55g tank for them.
2 - If you want to keep multiple mbuna in the same tank you need lots of rocks. They are cave dwelling fish. The more rocks / caves there are the more comfortable the fish will be.
3 - To keep multiples they need to be stocked in fairly specific ratios of male to female. These fish are harem breeders i,e, 1 male to a group of females. In general with fish like the labs it's 1 male to 3 females. However, with more aggressive fish like the Demasoni it's 10+ females per male. The males tend to abuse the females and the larger groups allow them to get lost in the mix and spreads out the males aggression a bit.
4 - Stocking a 55g with mbuna - approximately 3 different species in groups of 4 will work well in a 55g.
I love Angelfish, they are one of my favorite types of freshwater fish. 
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