Last night I decided to check out the lobster tanks in the area. In one particular store that I entered, they had a tank with 2 lobsters. I thought that sales must have been good. When I questioned them, it turned out that sales were not good. Their lobsters all died! The 2 in the tank were there as a test to determine if the water was sufficient to hold the next shipment of lobsters.
I am not an expert on holding lobsters. However, if I were to have a tank of lobsters die, I would not be attempting to save the tank of water. I would dump it and start new.
The point is, you don’t always know what you are buying. That issue is of greater concern in a grocery store where retail staff turnover is often high, training is lacking, and knowledge of seafood is almost absent.
If you do not buy your lobsters from Ottawa Lobsters, please make sure that you know and trust the seafood department of the store you buy from. Check that tank on every visit. Make sure that they care for the lobsters and the tank.