I took my skimmer offline a couple months ago, so for me water changes are a must.I change about 3 gal/day on a system thats about 55 gal. I find the small daily w/c easier than the larger weekly ones.
I think most who are skipping w/c are using one of the low nutrient systems. like Zeo or bio pellets. So they don't have the nutrient load a tank without this would have.
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