drummereef
Team RC
Yeah, the method I described is definitely not as efficient since you add to the total water volume, but I think it makes up for it by making it easier to do more frequent water changes. Basically, if you had a 30g water change reservoir on your system it would be like changing 30g out of 210g instead of 180g, but that is still a 14% water change vs. a 16% water change if you did it the direct way.
I knew someone smart like you would be able to do the math.

