no, Caliistra taught me how to medicate properly.
You cannot save the packet or any leftover solution after you mix in the powder, you have to use the whole packet.
1. Use a measuring cup, figure out a point of reference as 10g, you must be able to see 10 divisions. E.g. 100ml of water, pour in the packet, mix. Then only dispense 20ml into the 2g tank.
I used to eyeball the powder and it did not work. This method worked and my CG ws cured in a week using MAracyn II + AQ Salt to cure her of dropsy and slime coat infection.