How does this one compare to others. Which do you recommend?
Poolmaster 22260 5-Way Test Kit with Case - Basic Collection https://www.amazon.com/dp/B00107039U/ref=cm_sw_r_cp_api_A5TEBbTDG3HMX
Poolmaster 22260 5-Way Test Kit with Case - Basic Collection https://www.amazon.com/dp/B00107039U/ref=cm_sw_r_cp_api_A5TEBbTDG3HMX