All my bettas are kept in 5.5 to 125g tanks. All the frys are kept in 10g til 4weeeks old then mocved into 29g tanks. til ruffly 12weeks. From there they all go to a 55g growout tank til 4m old then they are tanked and pictures taken for selling reasons. If i find one of the fry to be showing show finage. I then jar it and grow it out on it's on. This helps the m to grow faster and allows me to keep track of there markings and allows me to learn more on the coloring and geno of how there color came bout.
In other words, if the male PK {plakat} was black lace and female blue pastal. what % of the fry came out what color. I try to learn something from each frys geno and keep my show line and even sale line in top shape.