I think it comes down to each store, and each individual. I know a former shop owner that does maintenance and fish orders for a large retailer, and the tanks look great. Conversely, some of the small shops do not look anywhere near as good. Instead of a petition, a solution should be posed if you want to actually get anything done. A cost analysis of livestock loss could be the right push to encourage them to outsource that portion of the upkeep. The hard part would be educating the owners of the perils and pitfalls of an ill kept tank without losing sales.
Ha, I just proved to myself why I should never run a business.

Sidenote- never use the words "perils and pitfalls" if you are in sales, rofl.