Tiny 2.5 gallon!

  • We are currently upgrading MFK. thanks! -neo
Use it for a sump for a 5 gallon! :ROFL:
 
Go to a pond and take a handfull of the mud at the bottom. Put it in there with some old aquarium water and ID all the amazing life. Freshwater live rock, I call it.
 
I have my betta in a 1.5 gallon and do daily 50% water changes. The tank is also filtered.
Many betta breeders keep fish in 1 gallon pickle jars.
 
MonsterFishKeepers.com