Here is Kevin Kohen's quote from one of the many threads that he has posted refuting that Petco online gets their livestock from QM. Petco also uses A&M Aquatic Wholesale for livestock.:
"Drs. Foster and Smith has no financial stake in Quality Marine; we choose to purchase a large percentage of the animals we offer from QM, as in my opinion, they are hands down the best importer/wholesaler in the entire country. I first started dealing with Quality Marine back in the mid 80's working in a brick and motor retail aquarium store.
CIS is a stand-alone importer/wholesale operation, located in California, and is not affiliated with Drs. Foster and Smith, or Quality Marine in any way. CIS handles the fulfillment for Petco's online livestock initiative ...
Happy fishkeeping!
Kevin Kohen "