What % water change do you do each week? or bi-weekly?

I have to admit that I'm pretty slack... I typically do one a month, unless testing shows levels too high in nitrates and phosphates (meaning detectable on my non lab grade Elos/Salifert/Seachem tests). Obviously undetectable doesn't mean zero, but I don't fear high numbers.
I should really do better.

I usually change between 15-20%.

Now that the poll is up, I voted. Sorry I typed a whole explanation. :)

I'm do 30g's bi-weekly on my 120g. This is my 5th tank and just invested in a RODI less then 2mths ago...:doh:...
IMO,The most effective filtering method... Period!!!

I do about 15% every week. When My 60 cube was up. I'd do 10 gallons per week. Now with the 93, I play on doing 15 gallons per week. I seem to get good results with this routine.

none. (i know whats coming. be gentle y'all)

at least not since October last year anyway

sry. didnt have that in your poll

30% every 10 days to 2 weeks....

25% every 2-3 weeks.

Roughly 30% weekly.

Roughly 15 percent weekly considering im gone mon thru thursday every week, maybe its a comfort thing