Right I am so excited I am close to exploding! Because I have been in and out of hospital the past 3 weeks with a rupture cyst my boyfriend has said he is going to buy me the 16 compartment betta barracks that my lfs told me about 2 weeks ago. I cant get that tank out of my head!! and I am SO excited about it!! Now this leaves my 20g tank free so I was thinking of dwarf puffers, I have an outbreak of snails in the tank at the moment so I am considering feeding them to get the population up ready for the puffers. How many puffers can I fit in the tank? it has plants in it at the moment but I will be adding more to cut down on aggression. I also know I need 1m to 3-4f ratio to cut agression further. What is the best way of sexing them?