There are a few brands making shower filters that meet the standards for quality and effectiveness that we require to sell them. All filter chlorine very well, with percentage removal in the mid-nineties up to 99%. All 3 brands use kdf. As shown in the test results, kdf and the right type of carbon work VERY well in hot shower water conditions.
Only the CuZn shower filter will work on Chloramine. For an effective Bath Ball, we recommend and offer only CuZn.