My brother and his girlfriend have left me their vase (!!!) of three small goldfish for 5 days. The vase has some plants inside and some pebbles at the floor but no pump or filter. They usually do a 50% water change every few days and feed once to twice daily. The fish have been I would like to get them a proper tank and water pump, but I am concerned that suddenly changing the environment will shock the fish.
I don’t think that they will take home a tank greater than 10 gallons.
What do you think of this pump? I don’t see a water intake area for a sponge though…
Fish now in five gallon aquarium