Can my fish tank house another fish comfortably and safely?
I have a 10 inch /25.4 cm deep fish tank that holds up to 1.66 gallons/ 6.28 liters of water. Right now in the tank, I have one calico fantail goldfish, which is still very small, still a baby. Her mate recently died due to what I think was a swim bladder infection. I want to get another fish for the tank. But would it be safe and comfortable for the fish if I added another? Should I get a bigger tank first? Thanks for helping!
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Whoa. 1.66 gallons is too small for ANY fish, in my opinion, Certainly not a goldfish though there are a number of people who swear a betta would be happy and remain healthy in such a small enclosure.
You should look into getting a larger tank asap. Goldfish grow very large and produce a lot of waste. Ammonia accumulates much more quickly in smaller tanks and this may have been what attributed to the early death of your other goldfish. Even in small ammounts, ammonia is deadly to fish. Beneficial bacteria break it down into nitrites (also deadly) and then into nitrates (less harmful), but in small aquariums or tanks it is extremely difficult to maintain this cycle so full water changes are done frequently. This is stressful on the fish and a time-consuming chore for the keeper.
If you want to add another goldfish, you’re going to want at least a 30 gallon tank if this is going to be a longterm living arrangement. Fantail goldfish, like your calico, grow to be 8-10 inches in length and will need all the room you can afford. The most commonly used "rule of thumb" with goldfish is 20 gallons MINIMUM for one goldfish and an additional 10 gallons for each additional goldfish. If you had 4 goldfish, you’d want at least 50 gallons following this rule.
The "one inch of fish per gallon" rule doesn’t work for the majority of fish because not all fish are uniformly shaped and sized. Stocking a 10 gallon tank with 10 1-inch rasboras is very different from stocking the same tank with 10 inches worth of full-bodied goldfish.
Pics of adult fantail goldfish:
http://www.fishpondinfo.com/photos/fish/goldfish/fantail1.jpg
http://www.elgoldfish.com/articulos/guinness2.jpg
http://www.warrington-anglers.org.uk/junior/jamie_boulton1.jpg
you are already overstocked, goldfish need tank sizes of 20gallons per fish, large goldfish like comets need 55gallons per fish, these are filthy filthy fish and produce so many nasty chemicals and poo’s they will pollute your tank in a matter of days, its a sad fact.
The minimum sized tank for one goldfish is 40 gallons. Please get a bigger tank for your fish. A betta would be crowded in the tank you have now.
your going to need a bigger tank yes. For that fish alone probally a 55g which then you could add other tank mates.
The rule I always follow for a fish tank is: inch per gallon; so figure out how big the fish will get full grown and that is how big the tank should be or how many fish you can put in the tank. That rule has always worked for me.