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Between 12 and 18 inches--or 30cm to 45cm if you live in a metric country. They will do this no matter the size of your aquarium, so don't listen to the guy at the pet store who will tell you they will stop growing in a too-small aquarium.

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15y ago
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15y ago

They are quick growers and will reach around 5" fairly rapidly. Bristlenose Plecos (Ancistrus temminckii) can get as large as 8-9" in their lifetime of around 20 years though if they do well.

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14y ago

depends on the size of the tank/pond. I've see one in a pond that was 2 feet long.. not kidding you.

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12y ago

The common pleco can grow up to 2 feet, but some of the smaller species (like the bristlenose) can grow to 12 in.

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13y ago

It can grow to about 6 inches or more depending on how big your tank is.

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Q: How big can a bristlenose pleco get?
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Related questions

What are the origins of the Bristlenose Pleco?

Bristlenose Pleco is a type of fish which is also known as Busy Nose Pleco and comes from the rivers of South America. It is an omnivore and comes in the colours of orange, tan and white.


Can you put a pleco in with a gar?

Only if the Pleco is big enough


Do Dalmatian mollies get along with goldfish?

Goldfish should only live with goldfish except for a few exceptions such as a bristlenose pleco or apple snails for example


What are types of algae?

Pleco - Suckermouth catfish , Siamese Algae Eater, Albino Algae Eater , Ancistrus - Bristlenose pleco ,Oto Catfish , Plecostomus ( Very aggressive and go well with Oscar ) All algae eaters go well with Oscars.


Can the sworedtail fish live with the fantail fish?

No, you should only keep goldfish with goldfish (with very few exceptions such as a bristlenose pleco, apple snail or weather loach for example)


Can a bristlenose pleco a black mollie a betta and 2 Malaysian snails live in a 35 gallon tank or should you only have some of those and you want the bristlenose the most?

The tank would not be overstocked with what you have suggested, provided you have a filter running all the time and you do a 50% water change every week.


How big do regular pleco grow and black mystery snail and paradise fish?

big


How big does a hifin spotted pleco get?

the bigger the tank the bigger it gets


Can a baby pleco live in the same tank as a betta?

Yep! They'll ignore each other. Better have a big tank ready for the pleco when it grows, though.


What is the minimum size fish tank for keeping 3 bristlenose pleco?

It all depends on the size of the fish. You should have 1 gallon per 1 inch of fish. So if you have a 2 inch fish, its two gallons of water, and so on and so forth.


What are the names of different types of algae?

Pleco - Suckermouth catfish , Siamese Algae Eater, Albino Algae Eater , Ancistrus - Bristlenose pleco ,Oto Catfish , Plecostomus ( Very aggressive and go well with Oscar ) All algae eaters go well with Oscars.


Can a Pleco go with a Glofish in an aquarium?

I have a pleco and a Glofish together.