Looking for vitamin c shower filter?

sonaki powder type vitamin c shower filter
for Sonaki  UBS Vita Fresh  VitaPure vitamin c shower filter

The Vitamin Gelshower Filter belongs to the following:
1. Compared to a powder type filter, it does not turn brown easily (because of humidity and sunlight).
2. It doesn't smell which is caused by algae.
3. It has the advantage of dissolving equally of vitamin gel in the water compared to powder types.
4. It lasts longer compared to powder type filters which is more economically beneficial. (recommended for hotels and other types of guesthouse)