Do I really need to buy?

[Aquattro]

Originally Posted by IanWR

Here is an article by RHF on water changes: http://reefkeeping.com/issues/2005-10/rhf/

I think the summary is that the difference between doing 1 30% water change vs 30 1% water changes is about 5% (it's been a while since I read it, don't recall the exact number) in terms of nutrient export. He argues that frequent small changes are easier to do, remove the need to heat the new water, and help keep parameters more stable than less frequent large changes.

So assuming this is true, let's say the difference is negligible, then doing 30 times more work results in negligible change. Right?
Heating water is nothing, parameters should be stable already or you have other issues, and proper design and planning make any size change easy. My 50g water change takes about 3 minutes of actual hands on time, and another 10 to set up and add salt. Let's call it 15 min twice a month. Versus how much effort to do 8 or more water changes a month? For no difference.