New Bn Pleco. What To Feed?

I was at the let store yesterday looking for a algae eater after finding one of my "Siamese algae eaters" on the floor dead. (They were Siamensis and I was being stupid hoping that the white line above the black line was my eyes tricking me) I found some cute looking Brisltenose plecos and decided to get two. I put them in the tank after acclimating and remembered I don't have any food for them. Shoot. *face palm* I found out that they like to eat cucumbers so I put one sliced up on a clip in the tank. They are still ignoring it. They aren't showing any interest.
Am I doing something wrong?
Will the two BNs fight?

 

Give them time to discover it as actual food. If they have never had it before it might take a bit of time. I know mine loves his zucchini. He never cared for cucumber though. Elbert (that is him over there in my avatar) also gets algae wafers and occasionally he chows down on shrimp pellets.

 

Wait they eat zucchini. Ughhhhhh I thought they like cucumber. I'm so stupid.

 

They're very capable of eating both. It just takes time to adjust to a new environment and new food, like @mattgirl said.

 

No you aren't !!!!!! Other folks plecos like their cucumber and lots of other veggies too.

 

I feed my bristlenose vegetables, and he likes zucchini the most.
He will also eat bell peppers, cucumbers, yellow squash, butternut squash, carrots, acorn squash, and seaweed.

 

Do I just leave it there? How do I make sure he finds out its food

 

Yes, just leave it in the tank.
I typically remove uneaten parts after 72 hours from the time it was put in.

 

They are omnivores so need some protein as well. Can you place anotherpic of it?

 

Update
I found one dead half purple floating this morning. The other one is no where to be seen

 

Under the wood ?

 

Never mind he is belly up on the substrate

The purple part is his stomach.

 

nooooooo.
To be honest I asked for another pic cause I thought is was pretty skinny.

 

That’s so cute!


Anyways, my plecos love to eat any leftover food(bloodworms, pellets, homemade foods, etc), cucumber, zucchini, and earthworms.

 

Is one alive ???

 

The one I'm holding is the dead one..... The other one is still aluve

 

Ahhh ok

 

Oh. I thought that one was the live one.

I'm sorry for your loss.

 

I put the alive one in a 75 gallon tank so, that he doesn't have to worry about being bullied by my cichlids. He still isn't eating anything though. Is there anything else I can feed him? I tried tetra flakes and cucumber. He doesn't seem interested in either.