In fact there were dead fish, I thought I had mentioned it.
You didn't.
The live ones couldn't move and were stopped from getting to the top from the dead ones (I know I didn't mention that bit).
So you are claiming that every fish tank was crammed full of dead fish at the surface and was so full of live ones that they couldn't at all move? I am going to quote from more jokey forums to comment on this:
Photos, or it didn't happen.
I refuse to believe they have managed to fit so many fish in a tank that they actually cannot move. WIthout photos to back up your claim you are exagerating, and thus making your argument weaker.
Also, lots of dead fish in every tank sounds like fairly harsh disease hit. The downside to a centralised system is the rapid spread of disease. Had you asked you could have found out if there were any issues.
There might've been filtration that I didn't see, however the large amount of filtration doesn't make up for the fact the fish couldn't move (in my opinion). Regardless of how long they were in there for.
Are we here talking about your exagerated claims fo tanks so full of fish taht movement cannot occur, or that a very large fish is in a tank too small for it. To follow on from Paul's points on large fish, I have heard (I believe from CFC) that someone once just dumped a large fish on an lfs desk and ran. They now have two choices: kill it or put it in a tank too small and ask some of their customers with larger tanks (when they come in) whether they have room for the fish.
To a casual observer who just walks in this look sbad, but its by far the lesser of two evils. Obviously if you don't even make contact with the store then you will never know the reasons behind why a certain fish is in a certain tank.
And I do like the "In my opinion". Surely whether a fish can move or not is far from opinion, but fact. Either a fish can or it cannot move. One can add on that they can move freely or have space to move more naturallys, but not being able to move is a fairly easy call to make.
Now I am not a huge fan of sterotyping, but this looks to me to be a classic 6 month syndrome case. This is where someone keeps fish and comes on here for up to 6 months and starts to lear about how one small group of peopel keep fish. They then see a different way and cannot yet comprehend just how many different variations of keeping and selling fish there are and instantly hate the new and unfamiliar style.
Rather than trying to lear about the different way the first port of call is usually here toi complain where others without much experience chime in with "OMG that's terrible" without really understanding.