AquaChek Yellow 4-Way Pool and Spa Test Strips - 50 Yellow Test Strips - Swimming Pool Test Strips For pH, Free Chlorine, Total Alkalinity, and Cyanuric Acid - Quick and Accurate Results - Testing Kit

i have used this for about 8 years now and would not use anything else. I've been a pool owner for 40 years now, I live in Arizona so its mandatory to own a pool, and initially used the chemical drops and they worked okay but was time consuming and the drops would dry up. I started using the AquaChek Test Strips and immediately loved them. They are easy to use and give me good, relevant information. In the summer time when its over 100 degrees for 6 months at a time I check the pool chemicals every other day and these test strips really keep my pool in check. Wouldn't use anything else at this point.

Tried many types of pool test strips for our salt water pool, these are the best! Fast, easy to read and understand.

Always accurate and very helpful in keeping the pool looking great.

These test strips work fine but one bottle was sealed empty: no test strips, just the moisture remover. The only way I could figure to correct that was to return the whole order to Amazon

This is one of the most accurate strip tests you can buy. It is fast, accurate, and easy to read. There is only one better and it is the pool master 6 way test which also includes total chlorine/bromine vs just free chlorine like this test.( it also includes better plastic strips not paper) Once your chlorine levels are in range just having free chlorine is fine. When you are low you need to see the total chlorine as well because free chlorine does not even show up and if it does it goes away fast. Knowing what the total chlorine level is helps accurately add more chlorine which this test does not have. The pool master test and this test are always identical they both are very accurate and repeatable. I prefer the pool master but I also like to have a bottle of these as well. It is much cheaper to use test strips often to to burn through all your chemicals guessing.*** I tried over 7 other brands of test strips all highly rated on Amazon. NONE of them were anything close to as good as the two mentioned above. They may of been good for half the test but the other half they were terrible. I have no need to buy any other test strips other than pool master 6 and this aqua check. Also having a test strip that is repeatable and accurate save so much time and money.** the biggest thing I learned with taming cloudy water is low chlorine levels are likely the cause as long as your ph is in range. I use to be so timid on adding too much chlorine but over time I realized how quickly it lowers and needs to be frequently added anyway. In a spa aim for 5ppm chlorine as it will only lower from there. Most strips say 3-5 some say 1-3 but that is for pools not spas. Good luck.

This works well

Easy to use and understand

Accurate readings.