Changing Water

[TKOS]

20% or so per week. I have small understocked heavily planted tanks.

 

[daveedka]

the big tank (115g) gets 30% weekly and usually a 50-60% once a month

The two utility tanks get 70% weekly, sometimes twice weekly but I feed them excessively for the snails, and the 15g is heavily overstocked most of the time.
dave

 

[Harry Tolen]

50% every two weeks for most tanks, 40% per week for discus tank.

 

[NikkO]

40-50% every week either Saturday or Sunday.

 

[Fishsmurf]

50% twice per week for Discus tank
50% a week for other two tanks