Aquacheck Test strips "yellow" are very accurate test strips. 
We reccommend using them with Eco One and cholorine systems.
Test for Total Alkalinity, Chlorine, pH and Cyanuric Acid

Eco One Monthly Treatment, years supply

Eco One Cover, Vinyl Cleaner.  Excellent for vinyl, treats vinyl and makes cover look good and last longer.

Eco One Filter Booster Is an Enzyme based filter improver. It makes your spa filters work better.

Eco One Monthly Treatment is a non-toxic, simple, safe, effective,  spa treatment that moisturizes your skin while keeping your water crystal clear and odor free.

Eco One Pipe Cleaner Use this to clean and prepare the spa for using Eco One Monthly.

Eco One Pipe cleaner. Fast cleaner for spas.

Start your spa out with perfect water every time with our new EcoOne Pre-Filter. Removes most common tap water contaminants including most heavy metals, hydrogen sulfide, chlorine, VOCs, lime and bacteria while maintaining a flow rate of 2GPM or more for up to 8,000 gallons (or more, depending on initial water quality).

Eco One Starter Kit with three months.

Instant Ions in New 250ML size. Concentrated ions in a smaller bottle.  BEST AND LEAST EXPENSIVE SPA CARE!  New formula