Best way to keep your water crystal clear and safe, is easy, test it and correct if necessary.
These are my favorite brand of test strips because one strip tests everything, the hardness level, pH, alkalinity, and your sanitizer level, whether your using chlorine or bromine.
Most others require you to use multiple bottles to get the same results. This saves you time and money.
And it’s easy to use. With the jets off, dip it in about 6 inches of water for 2 seconds, remove it with the pad up, then place it next to the bottle and match up the colors to see what needs to be corrected.
On new spas test often, and once you have learned you can testing down to just once a week.