Yes, we recommend that you replace the mineral stone pouch after 1 month(max 3 months) of use. 

Just like a cell phone battery becomes unable to hold a charge anymore after a certain period of time, the mineral stone pouch also gradually loses its ability to produce magnesium-enhanced alkaline mineral water after a certain period of usage. 

To continue drinking alkaline mineral water rich in magnesium, we recommend that you replace the mineral stone pouch after 1 month(max 3 months)  of use.

The effective capacity of one mineral stone pouch is about 300 liters of water or about 1 month(max 3 months) in terms of time. 

Open the bottom cap of Mineral Maker and remove the stainless filter. 

Remove and discard the round white filter and mineral stone pouch found inside the stainless filter. 

Clean the stainless filter thoroughly if it has accumulated any mineral deposit. 

If the mineral deposit on the stainless filter cannot be removed, clean by soaking it in vinegar water. (1 cup of water + 30cc of vinegar).

Place the newly purchased mineral stone pouch and round white filter inside the stainless filter. 

Then, just like when using Mineral Maker for the first time, fill it halfway with water and shake to wash. (Wash 3~4 times) 

After filling with drinking water and waiting for 30 minutes to 1 hour, shake 3 to 4 times before drinking. 

If Mineral Maker won't be used for a long time, store it half-filled with water. 

And make sure to open the lid once a day to release any active hydrogen. 

If the built-up active hydrogen is not released regularly, the product may become damaged due to the pressure of active hydrogen.

Use water no hotter than 50℃. 

If you want to add hot water, make sure to add cold water first then hot water. 

(Microwave not allowed)