Here is a great link on the zebra loaches. I have never heard of red-tailed ones though. The tails of the ones I have are lightly striped like the stripes on their body.
http://www.loaches.com/species_pages/botia_striata.html
I have 2 zebras in my aquarium. They suggest keeping them in groups of 3 or more, but I could only find 2. I thought it might be a problem, but they appear to be a male/female pair and really like each other (it is a rare occasion when they aren't swimming together) and are non-aggressive so I never went to find another one. They are really easy to care for, they eat just about anything I feed the aquarium (Brine shrimp, daphnia, flake, sinking shrimp pellets) and just scavenge around all day long. They like hiding places like caves and pvc pipes, etc. Cool little fish, I hope you get as much enjoyment out of yours as I do. One of mine has pretty blue eyes and likes to come out the front of the glass and "waggle" at me.
Matt
http://www.loaches.com/species_pages/botia_striata.html
I have 2 zebras in my aquarium. They suggest keeping them in groups of 3 or more, but I could only find 2. I thought it might be a problem, but they appear to be a male/female pair and really like each other (it is a rare occasion when they aren't swimming together) and are non-aggressive so I never went to find another one. They are really easy to care for, they eat just about anything I feed the aquarium (Brine shrimp, daphnia, flake, sinking shrimp pellets) and just scavenge around all day long. They like hiding places like caves and pvc pipes, etc. Cool little fish, I hope you get as much enjoyment out of yours as I do. One of mine has pretty blue eyes and likes to come out the front of the glass and "waggle" at me.
Matt
