Goldfish are a hardy species and can survive in worse water conditions than most fish. The basic rules for keeping fish healthy are :- 1 inch of fish needs a minimum of 1 gallon of water, a permanently running cycled filter and at least 50% of its water changed every week. If you apply those basic rules your fish should be OK. I am assuming you are not trying to mix Tropical fish with Goldfish. If you are, then you need to get a heater for the tropicals so that they can be kept warm enough (75F). The goldfish would need to be kept in a different tank that has no heater.
Maybe your tank is not properly filtered and its water is bad. Are you following the basic rules of fishkeeping. " 1 inch of fish needs at least 1 gallon of water. (A goldfish is a 10 inch fish) Every tank must have a permanently running 'cycled' filter. Every tank must have at least 50% of its water replaced every week.
The size of a goldfish tank can affect the growth of the goldfish. A larger tank provides more space for the goldfish to swim and grow, leading to healthier and potentially larger fish. In contrast, a smaller tank can restrict the fish's movement and growth, potentially stunting their development.
Rule of thumb is to not mix tropical fish and goldfish.
No. They need a 20 gallon tank. Add 10 gallons for every fish after that.
Puffer fish are very aggressive fish and will tear the poor goldfish to pieces.
it depends on how big it is if it is a goldfish or beta it can be in a bowl.If it is one of those big tiger fish or aqarium fish then put it in a big tank. A fish will grow to the size of the tank or bowl. For instance, say a goldfish is in a tank, it will not grow as big as the tank; however it will grow big enough to be able to swim in their environment. The fish will not overgrow the tank. I had a six inch goldfish in a thirty gallon tank.
I can answer your question without you having to search and search. The good rule of thumb for freshwater is one inch of fish for every one gallon, but goldfish and saltwater are different. Goldfish need 3 gallons of water to every inch of fish, same goes for saltwater.
Goldfish do not get pregnant.
Yes they will, to prevent this you could buy a fish tank cage.
No, goldfish are freshwater fish. Any goldfish you buy in the store are tank bred and not wild caught.
Yes, but your tank size needs to support it. If you mean that a regular goldfish is a long single-tail goldfish, then you need at least a 40 gallon tank just for the 2 fish due to the size potential of the common goldfish. If you mean a regular goldfish as in a round bodied fantail, or perhaps a ryukin, then you need at least a 30 gallon tank for the 2 fish.
Goldfish are coldwater fish and so should only be kept with other coldwater fish. These include Golden Orf, Blue Dace, Rudd and Perch and several species of catfish. The things to remember though are the golden rules. :- 1 inch of fish needs a minimum of 1 gallon of water. :- Every fish tank needs a permanently running cycled filter. :- Every fish tank needs to have a minimum of 50% of its water replaced every week. Goldfish commonly grow to over 10 inches so one goldfish needs at least ten gallons of water (a minimum of a 13 gallon tank). Overstocking is easy to do and always results in disaster.