I went into petco to buy algae remover for my beautiful goldfish's tank. Nothing was wrong with her, just not great to look at the water. The young guy told me to simply add a pleco fish to eat the algae. Sounded simple enough. I hesitated because she was in a 10 G tank which is only big enough for one goldfish. He insisted it would be fine. A week later my goldfish is dead. Turns out the pleco can attack your fish and also give it a parasite. I had one fish that could have lived to 20 years and thanks to some uninformed petco employee, she is dead. You may just say it's just a goldfish, but it was my only fish and she was beautiful and happy before this terrible advice and now she is dead. I am so upset. I've invested in all this tank equipment and one incredibly uninformed employee has made it all worthless. You have a responsibility to educate your employees and also not sell fish that are carrying parasites. I can't believe that my fish is dead. I've worked so hard to keep her alive and the petco pleco killed her.