Minimum tank size for a full-grown common pleco? - Fish Tank

Pleco and oscar tank size - Oscar Fish Advice Forum
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Certain cichlids are notorious for aggression. Most infamous, the African cichlids are known for roughing up tankmates. A pleco of similar size may be able to withstand such treatment, but this is not ideal. Less infamous, certain large plecos, like the royal pleco (Panque spp.) can harm other fish in the tank. Aggressive cichlids and aggressive plecos make poor tankmates as they can all injure each other.
Pleco and oscar tank size - Oscar Fish Advice Forum - Oscar Fish Care
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The Clown Pleco is a beautiful specimen exhibiting a brown and tan stripe pattern (which changes as the fish matures). If you need to see your fish on a daily, weekly, or even monthly basis this fish probably is not for you. The Clown Pleco is found in root structures at the banks and driftwood dams. Where, due to its coloration, it is difficult to find. Properly housed, the same conditions in your tank will make him difficult to spot. Complicating sightings by the hobbyist is tank lighting. This species will not exhibit robust daytime activity in an improperly designed environment. Rather, they will stay in the shadows afforded by wood and rocks, as well as camping out in the small sized caves that should be provided. The Clown Pleco becomes easier to spot moving from location to location in dim light environments. The Clown is a wood eater, so driftwood is a must. It is territorial and will stake a claim to areas at the base of its favorite driftwood or a near by cave. At feeding times the Clown pleco will defend its patch of substrate against interlopers eating its food. Also, vegetables (zucchini, cucumbers, sweet potato, etc.) are required. Sinking pellets as well as algae and vegetable wafers should also be fed to this fish. This species creates a lot of waste. Good mechanical filtration and tank cleaning practices are required. Caution: If you are after an active algae eater this is not the fish to get. As many, many aquarists have discovered, one of the big problems with the common plecos is that they get big. Really big. These guys tend to max out, in the average home aquarium, at between 12 and 24 inches, and some can get bigger. This puts the fish at a size that is far too large for average home aquariums.
Photo provided by FlickrLeopard Pleco Temperament: Generally peaceful but once this fish reaches adult size it may eat very small tank mates
Photo provided by FlickrAquarium Pleco Fish, Plecostomus Catfish Species Care Guide
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The fish sold under the name Common Pleco in fish stores is normally no bigger than 5-10 cm (2-4 inches) but this doesn't mean that it will stay like that forever. Unfortunately, a lot of aquarists purchase fish without first finding out how big they can get as adults. In the case of the common pleco, you should expect your fish to eventually reach a size of 30-60 cm (1-2 feet). The Bristlenose Pleco (Ancistrus spp) is a much better option over the for hobbyists because they only get to about 6 inches in size, sometimes smaller depending on the species (there are lots of species in the Ancistrus genus). These bristlenose plecos can be very expensive for a freshwater fish with prices ranging from $10 to $50. There are albino varieties as well.Unlike many other plecos, the species normally sold under the name Common pleco are territorial and keeping two or more large Common plecos together is rarely it good idea. It might work out fine, but you are definitely taking a risk and you should be prepared to evacuate promptly if they fail to tolerate each other. Different individuals have different temperaments and the temperament can also change gradually as the fish ages. The risk for violence is probably lower if you combine large common plecos from different species with each other, but more research is necessary before we can say anything for sure. An interesting exception is the Bristlenose catfish ( Ancistrus dolichopterus ), a lot of aquarists have managed to keep more than one Bristlenose catfish in the same aquarium (regardless of fish size). I have a 20 gallon aquarium that is a ‘high series’ tank. I have 3 molly fish and plan to get a Plecostomus. I’m wondering what size tank a Pleco needs? I know they get pretty big but can I just get one and maybe go with it? I know all of our tanks are crowded more or less so.. would it hurt to give a Pleco a nice home?