is it a proper planted tank with lots of plants?
you dont buy a pleco to eat algae!!
they need to fed a varied diet they cannot just survive on algae just!
Interesting. So after reading a ton of threads on this formum you are the first peson to say that you don't buy a pleco to eat algae. Even in the species index on these very boards it says "Bristelnose catfish are not a strictly nocturnal fish. These algae eaters establish territories around caves, peices of wood and other hiding places found in tanks"
Now I feel like I am back to square one.
I think he meant to warn that bristlenoses won't thrive on algae
only, especially in a heavily planted tank where you probably won't have huge amounts of algae (and not all algae species are nutritious). I kept bristlenoses in my old kribensis tank, where I fed them blanched zucchini (you can leave a piece of zucchini in the tank for a couple of days) and cooked broccoli (mainly for my apple snails, since broccoli is high in calcium, but the BNs liked it too). This diet plus leftovers from the kribensis' pellets seemed to keep the bristlenoses in good shape.