“2-4 , 6 inch koi a 55 gallon tank” – A 55 gallon tank is most likely to small for 4 koi, although you may be able to get away with 2 small ones (3-4″ max).
Also question is, how many fish should you put in a 55 gallon tank?
Bottom Line The one-inch-per-gallon rule still applies, so be sure that you do not exceed 55 inches of fish in a 55–gallon tank. This roughly equates to four or five bottom-dwelling fish along with a couple algae eaters.
Beside above, how big of a tank does a koi fish need? Mature koi, the 36” long fish that we often see in koi ponds, need at least 50 gallons apiece. This means that 4 koi that large can only be kept in a 200 gallon tank, and that’s the minimum. If you want the fish to be healthy and able to grow, then a 12” koi should be kept in a 100 gallon tank.
Just so, how many koi can I put in a 60 gallon tank?
Not a good rule of thumb if you have a sixty–gallon aquarium with two 30” Koi! Or in the pond world that translates to thirty-three 30” koi in a 1000-gallon pond.
What fish can I put in a 55 gallon tank?
Guppies, Neon Tetras, and Zebra Danios all work well. Plenty of saltwater favorites will easily fit in your 55 gallon fish tank. These include Blue Tangs, Clown Fish, and the vibrant Mandarinfish.