mad, but common...i saw the same thing happen in a LFS near me,same fish too funny enough...i pointed out the marine thang to customer just before they paid, also witnessed them selling very poor quality discus to another customer who didnt even have a tank,was gonna set one up when he got home,i asked if hed ever kept fish before, no was the answer,after i pointed out the necessary i was promptly set upon by the manager + all his sat boys accusing me of losing him a big sale... after a few expletives + me threatening to smash his shop up i left, never to return ...makes me oh so mad, but dont make me too mad or ill turn green + start stomping!
tally ho