dwc help???

my girls are about 3 weeks old but still small about 11 cm, so should i base my ppm based off age or size?
about a week ago i gave them 12% 1ml/l. im still using tap water (200-230) so I can't really track what they are drinking.

I'm using an grow micro bloom 1-1-1 ratio

Age. For veg in weeks 2-4 use 1/2 strentgh neuts. Then full from 4- +

the girls are about 4 weeks old now kandy kush is really bushing out maybe too much...
any tips on growing in a tote it appears the plants branches are colliding with the other plants branches. one of the girls is growing right into another plant.

you could raise the light or LST.and yes up that ppm.