Unfortunately, my petco has just gone through the opposite =/ The water has gone down from about 2, even 3 inches, to less than one. All cups have algae, poo, and left over food floating around in them. A couple of cups had dead bettas rotting, and most were sick in some way. They were only veiltails, too. The HMs, DTs, CTs, and so on looked perfectly fine... they'd just left the VTs to die ): I was REALLY disappointed, because my Petco has been great up until now.
Fortunately, I'm kinda/sorta friends with some people there (that happens when you go 1-2 times a week
), so I'll tell them that this is NOT a good thing, and if it continues, I'll be taking my patronage to a different pet store (trust me, with over 16 pets, I do spend some money there xD), and will be telling my friends about the horrible animal quality exhibited.