Updated On October 30th, 2017
Pet's info: Fish | Unknown - Fish
Answered By Angel Alvarado, LVT 44
Licensed Veterinary Technician
This question includes photos that may contain sensitive content. Click to view.
View more to consider that the photos may include sensitive content.
For small bodied fish (tetras, minnows, guppies, etc) the general "one inch of fish per gallon" rule will likely be fine. For larger bodied fish (goldfish, plecos, Oscars, etc), it should be closer to one inch of fish per 3 gallons of water. Always use the full grown adult size when deciding how many fish to keep. Take into account schooling fish as well which should be kept on groups of at least 5-6 fish.
3Pet Parents found this answer helpful
Other Answers
Answered By Linda G, MS, DVM
Veterinarian
Hello, & thank you for using PetCoach. The general rule of thumb is 1 inch of fish per gallon of water. Do not forget to include rate of potential growth of the fish you choose. In other words, calculate for the adult or full growth of the fish you plan to add. Have fun!
0Pet Parents found this answer helpful
Two Easy Ways to Start Earning Rewards!
Earn 2X Pals Rewards points at Petco
when you use Petco Pay!