when does a water change become irrelevant

[kien]

Originally Posted by Proteus

So in the last month I've launched zeo and tm balling. Switching from prodibio to zeo I had a po4 increase but thanks to the people at the zeo forum I'm down to. 08 and dropping.
With zeo and tm balling I should have zero nutrients and water should be topped up on the big three plus trace.

So what's the point of a water change at this point? I haven't stopped my routine only slowed it down from 10g a week to 5g

This is a very good question and I'm curious myself. We are all trained to believe that a water change is the bees knees, but if you're running on balling, have a really good skimmer and run carbon to take out dissolved organics, then is it ?

I do agree that the NSW helps to, well, freshen up the water, but is it needed ? Who knows.

It would be an interesting experiment. Although possibly a difficult one to conduct.