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Fish/Feeding an Ancistrus


Hello Richard,

Recently I got an Ancistrus and I'm not quite sure how much I should feed him. He's constantly scavenging for food, but I don't know if that's just his nature, or if he's actually hungry all the time.

I feed him 1 tablet (Tetra Pleco Tablets) every second day.
The days I don't give him tablets, I feed him sliced vegetables (cucumber and zucchini).

I am not sure about his age, but he's around 2,5 inches.

I don't know if my specifications are relative to my question, but here they are just in case: 16 gallon tank. In the tank there are 5 Cardinal Tetras, 5 black Phantom Tetras, 1 Pearl Gourami, 1 Ancistus, and 1 Apple Snail.

Many thanks!

Hi Julian

The Ancistrus diet should be primarily greens. Any type of algae based food such as algae wafers and algae flakes. The Tetra Pleco tablets and the cucumber and zucchini are good choices. Another good choice is TetraVeggie. He will also eat algae that grows in the tank as well as leftovers from the food you feed the other fish.

Hope this helps, good luck!



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Richard Hight


I own and maintain several freshwater aquariums from 2 to 180 gallon. I can answer most questions about freshwater aquariums, including setup, cycling, maintenance, compatible tank mates, feeding. Moving? I've moved fish both across town and across the country and can help you get your little aquatic friends to their new home safely. I know and have experience with most freshwater community fish, South American Cichlids and African Cichlids. I don't answer questions about Goldfish or keeping Goldfish with Tropical Fish. I also don't answer questions about keeping crustaceans (shrimp, snails, crabs etc) with Tropical Fish, nor questions about saltwater fish or aquariums. I'm not available to answer questions on weekends, this is when I do maintenance on my own tanks.


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