Goldfish in 29 Gallon?

Question

I have 3 two inch fantails in my 29 gallon tank with a 30-55 gallon filter and a few people have posted my tank is overcrowded and that the fish will out grow my tank. Is that true? I thought they only growed to be 6-8" each.

I have one red fantail female
one nacreous male fantail
and 1 red female fantail w/ black finnage

its a regular 29 gallon

they are FANTAILS
and the tank is
2 ft, 5 1/2 inches long approx
1 ft 6 inches high approx
1 ft inches wide approx

Answer 1

While it is true that goldfish are dirty little guys and need more tank space than normal fish, two 3" fish in a 29 gallon tank is not overcrowded. Your filter will do the job until they reach full adult length, then you might need a bigger one. Try to find one that cycles the water at around 400 gallons per hour (GPH). The rating is usually on the box.

Just be sure you are doing regular weekly partial (40%) water changes and vaccuuming the gravel twice a month. That will keep them healthy and happy.

Answer 2

Your tank is not over crowded right now, but as the fish grow it will get over crowded eventually. They will hit at least 6" depending on the specific type of fancy you have. If you are thinking about the 1" rule, throw that right out the window. The 1" per gallon rule it totally bogus and should never be used for a tank. Goldfish need plenty of space and at adult size need around 15 gallons or so each to be comfortable. Shape of the tank is important as well. For example, your 29 is fairly tall for the number of gallons so I would say 2 adult goldfish max in that tank. A 30 gallon tank however is much longer and lower for the number of gallons and would be ok for 3 goldfish even though it's only 1 gallon larger. the shape does make that much difference. That's just another reason the 1" rule doesn't work.

MM

Answer 3

Goldfish produce a LOT more ammonia, so it's best to have 2 gallons of water for each inch of adult sized fish. If these guys average 7" you really should have them in a 42 gallon tank. Taller tanks are best because they like to swim up and down (a pentagon shaped 44 gallon would be perfect for you).

Answer 4

You can do this but change 50% of your water weekly and don't skip out very often. You are at max capacity for your tank with goldfish, but big water changes often, will help. I keep 4 fancy goldfish in a 55 gallon and my tank is maxed out because the fish are big. Don't be scared to change water it never hurts.

Answer 5

A rule of thumb when sizing your fish for a fish tank, allow one inch of fish for one gallon of tank. So if you 3 fish now that are going to grow to 8 inchs each, that would require 24 gallons of tank. You should be fine with the 29 gallon tank. If i were you I don't think I would add any more fish though. It's always nice for them to have a little extra room.

Answer 6

Picture three 8 inch fish swimming in your tank...


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Answer 7

sounds ok to me.