Who Gives A Fish Forums

I've found that smaller aquariums do require more frequent water changes, to keep the water parameters in line with the source water. How often do you change the water and what percentage do you replace, I'm curious to know if my approach is off.

I was just wondering, is Sidon's tank set up to give him plenty of places to chill out? If he's not got enough spots to rest, he might be getting stressed and nipping at his own tail, which could be part of the problem with his fins.