Yes, that's it! 30gal is the smallest tank you should use for mbunas. IMHO, you can have in that 30gal tank a maximum of 6 yellow labs but only 1 male and 5 females.
10 gallons is where i rescued my lab from.He was an adult, he thumped the glass all the time. My lab has never been with other mbuna, he does not act them so much,But he is still semi-aggressive. I would really try for a 36"-48" tank. There are usually alot of people looking to labs try finding a home for him here or craigslist.
alright. thank you guys a lot. i'll either try finding him a home on craigslist or i'll just use the 30 gallon for him and a couple other females. i appreciate the help. =]