Originally Posted by GorgeousTheBetta
I only got the tank and goldfish yesterday at PetBarn, so I might move them soon if you think this is too small . The tank is around 120.5L (about 30G?) and the filter is a 'air driven and/or sponge' filter. I have a feeling your gonna tell me that this is too small...
Ya. That is too small for comets. A tank like that could hold a single fancy goldfish, but comets get large and need large tanks. For three comets you are looking at a minimum of a 125 gal, 6 foot tank (470L, 1.8m). Really ponds are the best places for these guys.
I know this isn't what you want, but could you return the comets? Or trade them in for some fancy goldfish. Those are the only goldfish that could fit in that tank.