How often, and how much at a time should you do water changes, i have a 125 gal. salt, ive only drained about 20 % 1 time and replaced it ??? p.s. its about 6 months old
From what I have read, at a minimum, 10-20% on a monthly schedule. It's better to do less on a weekley basis. But I woulod bet a lot of people have good luck with much less.
10 - 15% every 2 weeks... Sometimes I miss a week but what ya dgonna do
Deffinalty more then 20% every 6 months though. how are your water paramaters? heavily stocked? I only have 5 chromis a hippo tang and a perc clown so very low bio load as well