9 comments to “What is the smallest freshwater fish that can live in a gallon of water?”

1. CCM wrote:
   13. April 2008 at 2:37 pm :

   Try guppies or betta fish

2. fish man wrote:
   14. April 2008 at 11:27 pm :

   the minimum tank size even to be considered or fish is a 2.5 gallon and thats only suitable for a betta

3. tprice_25 wrote:
   17. April 2008 at 9:15 pm :

   Try siamese fighting fish

4. KDHeine wrote:
   21. April 2008 at 8:38 am :

   most people will say none, because thats not suitable for any fish yata yata yata , but before i put my male betta in a suitable home (1.5 gallon filtered tank), i had him in a 1 gallon bowl for a year, now that hes in a filtered tank, hes never had any problems, and now hes over 2 years old, which is pretty good id say, and i expect him to live for much longer now. if u plan on gettin a fish, i would get a betta, and a betta only (male or female, but only one if gender), and if possible, upgrade to anything bigger with a filter, so that they can live as long as possible… good luck with it

5. Dominic B wrote:
   23. April 2008 at 9:12 pm :

   A neon tetra fish , they’re only like 1.5 cm long

6. Some1 who loves BETTAS!! wrote:
   25. April 2008 at 11:14 pm :

   A betta would be an ok choice. If the room temp is below 75F you need to but him a hydro mini aquarium heater ir else he will be less active and will catch disease easier. Also, NO GOLD FISH! They need 10 gallons each!! Guppies need to be in numbers and most small fish are very very active and need 10 gallons. Bottom line, NOTHING smaller than 1 gallon. If you have 12$ to spare you can get a 2.5 fallon tank at pet smart! Good luck with your fish!!

7. catxcatxx wrote:
   26. April 2008 at 4:48 pm :

   Nothing can live in 1 gallon of water.

   Bettas really need 5 gallons, filtered heated minimum. Guppies need 10 gallons filtered heated minimum.

   Inform your teacher of that. All fish need fully matured and filtered proper tanks.

   If you must do experiments look into the Walstad Method but no fish!

8. i'm me wrote:
   28. April 2008 at 12:02 pm :

   Neon Tetra
   Tiger Barb
   Guppies
   Chinese Algae Eater
   Molly
   Platies
   African Dwarf Frog
   Barb
   snails
   betta

9. Andy wrote:
   30. April 2008 at 12:02 pm :

   That is a very small tank. and not many fish are “good” in that tank. one Betta would be ehh ok. one male guppy would again be ehh ok you don’t want any female live bearers as they could be pregnant when you buy them. Even putting one male guppy in the tank isn’t that great of an idea as they are social fish and get about 2in or so which following the 1in per 1gal means he is too big for the tank.