I have terrible luck with Pleco's, they die within 2 days, I've tried hi-fin spotted pleco's and common both die. My water is perfect with other scaleless fish thriving (BGK, pictus cat and Peacock eel) and they are not starving because they dont live long enough to starve(and i had algae wafers). I have gotten them all from petsmart but thats where I got all my fish and they are all healthy. Anyway Im done with pleco's, I'm looking for another "algae eater" that gets to a fair size (6-12") that I can try.