Replacement filter disk for the Bath Ball is made of non-toxic and recyclable kdf material. For optimal filtering, change once a year.
FITS EVERY BATH BALL WE EVER SOLD.
Also fits the GardenMate, which is no longer manufactured. Box will indicate Bath Ball refill. Is the same as the GardenMate refill.
The most important thing to filter at the shower and bath is the disinfectant. Adding carbon, with the dual media version, means there are two media optimized for filtering the disinfectant.
The chlorine version BR-104 uses kdf 55. The chloramine version BR-104-85 uses kdf 85.