Originally Posted by Clenny
Hello all. I am new to the fish world. We have a 10gal tank that was bought for us. Don't know much else about it at this point as I am still on a major learning curve. We started out with 2 goldfish but they did not last long. We are now on our fourth by himself in the tank and he seem to be doing okay now that we took the heater out. If anyone has suggestions out was else we can add to tank it would be greatly appreciated.
Even though goldfish is a very hardy fish that can withstand many crazy water conditions, it is important to have your tank cycled. You can google fish tank cycling for the process and what it does. A heater is not necessary since goldfish can live in cold water, but if it is below mid 60s you might want to bump it to at least 70.
Filter is important for goldfish since they produce a lot of waste and are messy eaters which leads to a high ammonia level. And of course ammonia is bad for the fish.
It is very important to do a pwc
(partial water change) about once a week. Removing 10-25% water a week with a gravel vacuum should suffice to remove the waste and food.
Many will suggest not to keep goldfish in a small fish tank since they usually require a large pond 55 gallons or so depending on the type. Comet grows to at least a foot, but in my opinion it's ok when they are small but definitely rehouse when they start growing big. In a small tank, their organs will keep growing but their body won't and you can kind of imagine what will happen.
I raised a comet goldfish from a baby to five inches in a 5.5 gallon but I felt bad for caging it in such a small environment so I have it to a local fish store that would take it.