Well I wasn't recommending that people add that amount of betta's,
My point was more so that if you were to add more females, adding the exact same amount as already there seems to work better, Of course the age of the betta also comes into play as well.
By the way, how do you even feed all 18 girls Chicklet? I have issues remembering who got a pellet or two and I only have 4 girls.
Well first off I don't feed pellets, Different reasons, One reason being Pellets from my experience have actually caused me bloat issues.
In which my own blend of flaked and freeze dried mixture has never given me an issue, I just drop food in all over the top several times aday,