I thought I'd add my favorite remark from LFS(In reference to discus).
I commented that I'm doing daily W/C's of 40%.
The college age kid stated(after looking @ me like I was an )-" That's OK, if you got nothing better to do!"
After seeing how fast nitrates climb with multiple feedings in my discus tank, I'm glad I get my info here & not @ LFS!
I'll keep changing water here!
Rob