aquarium cleaning service in Chicago area

One of my coworkers has a 150 reef tank which they had serviced
regularly by the local LFS. They charge on a per gallon rate, and for
the 150 gallon tank it was $250.00 a month (water testing, water
changes, tank cleaning, and any water adjustments). My coworker told
me that the rates were adjusted up even higher for new customers.
This rate seemed pretty high to me, and you could buy alot of nice
livestock, and or equipment for this much money every month.