Peacock Eel Tank?

I would consider a 35 to be the minimum for one peacock, and not plan on having much else in with it. A 50+ would be much better.

In terms of companions--the considerations are something that will be too big to be eaten. Smaller rasboras/tetras will be snacks for an adult peacock, but some of the larger species would be fine. Glass cats and bumblee cats are very different animals. I have vespas, and I wouldn't put them in with an eel because they are SUPER fast and would out compete the eel for foods. With tetras and other fish in, you'll need to feed after lights out to ensure the eel gets enough (or target feed, provide foods too big for the other fish but not too big for the eel).

A harem of female bettas would likely be just fine.

I have a couple of Tanganykian spiny eels, much more enjoyable than peacocks or other Asian species that like to stay buried in the sand. One is a plagiostoma,orange and black banded, the other is a tanganicae, sort of a leopard spotted brown pattern. Both are smaller species, narrower and a bit smaller than peacock eels, not more than 8" long. I had kept a pair of plagiostoma in a 29 for a couple years w/out any problems, lost them during a power outage. They spawned a number of times, but the tank was set up with reverse-flow UG filtration and the male kept eating the eggs shortly after spawning. Tank was completely covered, but the two I have now are in a 125 with cichlids with openings at the top for hob filters. Unlike the other spiny eels the Tanganykians don't try to find any available escape route or even seem interested in the outflow from the hob filters. I lost some Synodontis petricola catfish to the filter outflows, they landed on the glass tops instead of in the tank on the return trip after swimming up the filter outflow. A 40 breeder would be fine for either species, as well as a pair of Julidiochromis cichlids. They are fairly rare, but you'll have plenty of time to find one or two online between now and the time you set up the tank. Mine eat NLS pellets along with the cichlids, occasionally frozen bloodworms. The first pair of plagiostoma were fed the bloodworms exclusively in their own tank, which kept them fatter and spawning in season, but it's not necessary.

Regardless of tank size remember the escape factor. I have rescued eels from the carpet on a couple of occasions over the years. I have not had them in a while but they are interesting and fun to have. You can't put too much effort into escape proofing your tank.

Best of luck finding the tank and you did a very smart thing, you asked. People on the forum have a ton of knowledge and can save you time, money and heart break when your $60 fish is dried up on the floor.

well if you dont think you can do maintenance on a big tank like that.then look into kuli loaches.they are like little eels.hey hennincs long time no see.my user name is big b from af.