I'm not sure if this counts, but my LPS
is pretty bad (They do have a HUGE fish section though).
One thing that some of the employees do is grab water out of another tank (To fill up the bag) and grab fish out of a different tank (Each tank is their own system - As in each of the tanks have their own HOB
Another thing they do is (Witnessed) - Instead of doing water changes, the put a siphon at the end of a canister filter and gravel vaac each tank (So basically it's not even a water change whatsoever - their just cleaning the gravel with a canister filter and putting back the old water in).
section, if I must say is impressive though... (Owners are originally SW
on the other hand is great, not many flaws.