Roozen's rocks. What other fish store can boast two 5,000 gallon sumps, many more hundreds of aquarium gallons, and 1,000's of pounds of live rock to keep the water adequately filtered?
And as far as the algae and aiptasia? So what? What does that have to do with water quality or quality of life for the fish? Nothing as far as I know.
And for the dead fish? What other fish store doesn't experience die off when they receive their livestock? I have to believe that they all do, it's just that they make more of an effort to keep them out of sight from the customer.
Obviously the guy is not there to keep a show tank with ozone, u/v and all the other techno gadgets common in the hobby. He is there to provide an abundant, varied and healthy supply of livestock for the marine hobbyist without a lot of overhead or extra cost.
I rather like the Roozen model.