I can't seem to decide on which tank to get for my fancy goldfish. A 40 breeder would fit into the space I want to put it more comfortably, but a 55 will fit as well. Also, the 40 breeder seems to offer a bit more side to side swimming room and surface area. If I go with the 40 I'll probably only get 3 fancies total, but with the 55 I'd get 4. Also, I have a 55 and it's a bit skinny. I thought the fish might appreciate the extra depth. What do you guys think?
Fancy Goldfish: 40 Breeder vs. Standard 55
- Thread starter Laser
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Sssea
Aquarium Advice Freak
IMO, I would go with the 55, purely for more water volume. I think with such a messy fish, they would appreciate more water than more activity, in contrast to say an incredibly active fish with a lower bioload.
Hope that helped/made sense!
Hope that helped/made sense!
jlk
Aquarium Advice Addict
Go for more water volume. Fancies actually dont appreciate extra depth- the pressure from deeper water actually can make it more difficult for them to swim and can aggravate buoyancy issues. Some breeds are much more affected than others. You can manage four as long as you stay on top of your big water changes. 
bud29
Aquarium Advice Addict
Yeah I agree with everybody else. In this case more volume beats more depth.
By depth do you guys mean how deep it is from the top? If so, the 55 is deeper. The 40 gallon I was looking at is 36 inches long, 18 inches wide, and 16 inches tall. The 55 is 48 inches long, 12 inches wide, and 21 inches tall. I still tend to think that more water volume is better as long as the tank isn't super tall like some I was looking at.
jlk
Aquarium Advice Addict
I would still choose more total water volume. The more water you can offer them, the better.
I would go with a 40b because it has a larger foot print. Water volume doesn't mean everything. A 40b offers more swimming room. There isn't a need for more water volume as long as you do proper maintenance on the tank (water changes, gravel vacuuming, filter cleaning etc). A 40b will prove to be cheaper and more spacious.
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