Measuring is knowing
To properly maintain jacuzzi water, you need to filter it, but also keep your chlorine and pH levels up. It's recommended to measure 3 times a week and afjust the values if necessary. 
There are various measuring instruments on the market to measure the water. The simplest and also most reliable way are the disposable test strips. Do you prefer a more detailed measurement? Then choose a digital meter. 
From our wide range, everyone is sure to find the perfect meter to measure the spa water! 
On the basis of the measurements, you can know if your chlorine and pH are still at the right level, is this not the case? Adjest these values with the right products. 
After you have added any products, measure again after 4 hours.