So overwatering afected all girls except SHERBET who stayed strong
I thought what apeared on the leaves might have been ROYA / RUST or ALTERNARIA.
Having no dedicated remedy for this y added a couple of drops of bee propoleum, stopped watering and transplanted to 7L pot.
GSC took a hit... i believe overwatering stopped her groth a bit, ussually buy week 3 plants double their groth, so she should have been round 9cm but shes only at 6...
looking a bit better at day 25