Having tried to get the water clear again using other products this just worked

We found the chemical starter kit easy to use and very efficient, our hot tub is sparkling clean.

The kit was easy to use ,the instructions where on each bottle and simple to follow.

It works well but you need to use the whole bottle each time, so as I have multiple filters I do them all at the same time.

Acts almost immediately to clean spa filters. Not perfect, but what is?