How many fish can I safely and properly put in a 30-gallon tank?

Question

How many fish can I put in a 30 gallon tank? I currently have 4 ghost catfish, a Columbian tetra, 3 neons, 2 medium fantail goldfish and a large fantail goldfish. I want 2 rainbowfish and a cory catfish. Pet's info: Fish | Unknown - Fish | Male | 1 month and 27 days old | 0.02 lbs

Andrea M. Brodie, DVM · Accepted Answer

The rule of thumb is 1.5" of fish per gallon of tank. So estimate the length of each fish you have, add them all and divide by 1.5. This will give you the size tank you will need in gallons. In a 30 gallon tank you can keep 45 inches of fish (i,e, 45 fish, each 1 " long or 30 fish , each 1.5" long, etc. Do not forget to leave some space for growth of fish.

How many fish can I safely and properly put in a 30-gallon tank?

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