What kind of fish can i keep in a small aquarium without an air pump?
Goldfish are very messy fish and can grow quite large that is why they need a minimum of 10 gallons each for fancy and 20 gallons for single tailed. They can live 20+ years but most people only have them for a year or 2 because they slowly kill them by keeping them in something too small and don’t keep up with the water changes needed. I agree with the person that said get a 10 gallon tank, for the cost of a 5 gallon you can get a 10 gallon and be able to keep more fish, whatever size tank you get though you need a filter. An air pump isn’t a must but it is a good thing to have, it also makes the tank look nicer. You can keep pretty much any small tropical, like guppies, platies, or even a sorority of female bettas but if the room the tank will be in gets too cold then you will also need a heater. You can get something like white cloud mountain minnows if you don’t want to use a heater though.
