Can comets be kept in and indoor aqaurium?

Question

and if they can, how big of an aquarium

Answer 1

I would not recommend it. Comets get large, about 12". If you want to get comets then get a pond, that way it is easier to maintain and you can stabilize water parameters more easily since it is a larger body of water then an aquarium. If you absolutely had to put them in a tank I would go no less then 100 gallons...and that's just for one fish.  

Answer 2

50 gallons for every 2.

Answer 3

Yes, if the tank is big. (50gal+)

What many people do is buy small comets (cheap) and keep them in their tank for a year or two. When they start getting big they move them to a pond and they are big enough to avoid being eaten by birds etc.

Means you can keep a small school of small / medium size comets in your tank, and you aren't buying feeder fish for the local kingfishers.

Ian

Answer 4

One comet goldfish needs 55 Gallons to itself.

After that, you'll need at LEAST 20 gallons per additional fish.