RO question/advice

[Junmity]

Yes,

I'm transferring the contents of my 30 gallon tank which also has cured rock.

i just meant that i have a 30 g mixing tank and the day it takes to produce another 30 g of ro gives my first batch more time to mix....

i already put new live sand in the 90 so i'm mixing my salt then adding it to the 90 g slowly.

i plan on moving half the rock over and then letting it cycle.