What happens next?

How to feed a pleco
Keep driftwood in the tank at all times.
Your pleco needs lots of fiber in their diet, and they can get it from driftwood. Make sure to provide several pieces of driftwood in the aquarium at all times so your pleco can suck and scrape it off.

pick from the following. I. Your pleco should try to eat a percentage of the sea gravel that you regularly use. The water will be fresh as the saltwater is added to the tank, so any saltwater you use will remain fresh in the tank. II. You can buy driftwood sold at pet stores or online. Alternatively, you can put a large chunk of driftwood in the tank at all times to encourage your pleco to eat the new found content. III. Try renting gravel for the aquarium, or strategically placing aquatic structures on the floor. Live plants in captive fish tanks are essential. IV. The tiny pieces of driftwood the pleco eats help with its digestion. Rather than collecting driftwood yourself, choose real driftwood sold at fish or aquarium stores to ensure it is safe for your pleco.
IV.