Originally Posted by Andarial
I'm not sure, if you get a breeding pair I think it'd be fine, or two females (though not positive on that) ,though I have heard of people keeping Bristlenoses together without issues though I have no idea what gender they were
From the research Ive done, Plecos are pretty difficult to sex, as they don't normally have external factors such as mollies and platties do. Sometimes they say females will have a rounder nose or stuff like that, but you can never really be too sure.
I think these plecos are beautiful, if you're able to find them anywhere. Also -be sure to know what type of "algae eater" you have, whether it's Siamese or Chinese. Chinese algae eaters do not, in fact, prefer algae in their diet. they may eat algae as juveniles, but will grow up to prefer flake food, and are agressive. If you have an aggressive tank, its best to either buy in groups of 5 or as a single member. I have a single juvenile in my tank right now with plenty of hiding spots and he hasnt shown any territorial behavior, so im lucky for now. But if you like the way they look, I suggest getting a lot of Otocinclus. They are very similar in looks and size, and can tolerate a wide range of water parameters. They are best in groups as well.
*EDIT: I got my information backwards. Chinese algae eaters can tolerate a wide parameter of water, the Ottos cannot. Ottos are peaceful fish, best kept in a group of 3 or more.
Oto Catfish (if you'd like to read about them)
And the image i attached is a Starlight Pleco, available as BN