he doesn't have a bare tank, it has huge pieces of wood, slate and terra cotta caves, with common, ringlet(panaque), royal, gold nugget, and vampire plecs. what i'm saying is that the fish don't feel the need to hide all day because they are secure in their surroundings, not scared all the time. can they hide? yes. do they always? no.
yes, i've seen fish spook as well, my sailfin always hides when the lights come on for an hour or so, but ends up coming out when he calms down. you weren't talking about the owner scaring the fish, you were talking about the fish scaring each other. do they pop up and say "boo!"? my point is that fish being aggresive to each other will take more than a couple days to kill from the buildup of stress.
most LFS' label plecos as algae eaters. just because an LFS says it, doesn't make it true. most of them would sell their grandmothers as algae eaters if they thought they could make a buck. any site you visit, anyone who cares for the plecos they keep, will tell you that plecos need more than just everyday tank waste, otherwise why do you feed your big plec veggies? why not just sprinkle a little flake on top and let him hunt for it when it sinks?
i am most offended because you know it too, and yet you perpetrate the myth that plecos don't need to be fed. people are always buying these fish, wondering why they die. . .well, if someone had told them the fish needed food (big surprise there) maybe it wouldn't have passed away so soon.
and yes, this thread was about algae eaters, but without the original poster saying what kind of fish s/he has, it doesn't make good sense to say that it will eat algae and needs nothing else. plus, it's not even a pleco, she has a chinese algae eater.
hey, go ask about your equipment, i won't bug you there, but if you make a habit of telling people they don't need to feed their fish, without even knowing what kind of fish it is, you're going to get called every time.