Personally, I'm a big fan of minimum interference possible, maximum results possible.
This philosophy would drive a 10% water change every couple of weeks.
However, I'm reading in the forums more is better.
Can I get opinions on this?
It's interesting to look at the math in this post: http://www.simplydiscus.com/library/water_chemistry/general/wc_formula.shtml
When your doing your water changes do you always use a water conditioner to use Chlorides and Chloramides?