I have had pleco's in the past, but none have compared to my Leopard Sailfin Pleco. Absolutely beautiful, and very good with my other fish. I have mine in a 200 L community corner tank and he has grown nicely. Very active at night, and displays his dorsal fins more often then he has a love for melons. I have never seen him go after any of my other fish, all of which are smaller than he. I have 6 sailfin mollies all rather young, 3 cherry barbs, 3 zebra and 1 fancy leopard danio's, and 1 male 3 spot gourami. I seem to have plenty of algae for both him and the mollies, but provide other food as well. All in all, I could not ask for a better bottom feeder/algae eater. I highly recommend.
I've had two gibbiceps plecos over the past ten years. They do grow large, but it takes some time and my local fish stores have always been glad to trade my large ones for smaller ones. I've also got Otocinclus affinis and Crossocheilus siamensis in my 200 L tank with the gibbiceps and they don't seem to be able to rasp the tough green spot algae quite like this pleco does. Even a bristlenose pleco didn't do quite as good a job on the green spot algae as this guy. The tank is heavily planted and the gibbiceps has never harmed or eaten any plants, except when he gets excited about his algae wafer and uproots some of the grassy Marsilea in the front. These plecos have become a definite part of every planted tank I own.
I have 2 sailfins of 8 cm and 13 cm. They live with several shubunkins, 2 weather loaches and a common plec. WARNING: they will attempt to graze on the goldfish, which upsets and damages them. Feeding the plecos green beans and pieces of prawns, mussels, squid, etc. stops this undesirable behaviour. Bogwood, wafers and algae obviously isn't enough for some fish. My sailfins seem well enough so far in cold water, which is not supposed to be the case.
I have a spotted sailfin pleco in my Malawi cichlid tank. He is about 9 cm right now, I bought him when he was about 6 cm and I have had him for about 3 months. I found that he loves zucchini, and since I started giving him sweet potato 1 month ago, his orange has become much brighter. I had 4 bristlenose and an albino bristlenose in the tank and he wasn't overly aggressive towards them, however I moved them anyway. Other catfish in the tank is a Synodontis eupterus, two S. decorus and two upside down cats.
I have had a leopard pleco for 7 years and he is 24 cm long. He gets along happily with 2 angelfish, a albino tiger barb, 5 silver tip tetras, 3 clown loach, 5 neons and 3 cardinals. This is a very peaceful fish, although it needs a large aquarium (180 L minimum). He is so peaceful he lets the clown loach sit on his back. Overall great fish.
These pages have enough comments to give the reader a basic idea on the topic. Further comments are still very welcome (through the site's contact form) as long as they provide new and/or advanced information not yet discussed in the existing ones.