Ok great, I don't have any carbon in there.
I use RO/DI water for water changes with Kent liquid R/O right to get the trace minerals back. I have a 20 gallon Brute utility container with auto shutoff for the RO, circulator pump, and heater to stabilize the water before re-adding to the tank. This holds about ~15 gallons of finished water which is my normal ~30% water change.
This is basically a long way of asking if you think it would be alright to do multiple 30% water changes per day instead of the suggested 90% water change.