It is very important to test your swimming pool, hot tub or spas regularly to ensure safe water. Hold strip level for 15 seconds (do not shake excess water from strip). Compare Free Chlorine, pH and Total Alkalinity pads (in that order) to colour chart on the label.
eBay
Optocoupler Online Tester Electronic Maintenance Dedicated Tool Four Pin Optocoupler Testing Board Repair Tools
Aliexpress UK
30-Second Rapid Results : Perfect for busy UK households—dip the strip in water, wait just 30 seconds, and compare to the colour chart (on the bottle) for instant readings. No waiting around before pool parties or evening hot tub sessions.
eBay
【1PCS】BNC Male Plug to 4mm Banana Stackable Plug Crocodile clip Lead Probe Q9 Testing Mult Cable Cord 50ohm RF Coaxial Tangerrf
Aliexpress UK
Test range for total alkalinity: 0 ~ 240 ppm. 💦This pool ph test kit has anti-VC interference ability，The accuracy is 96%. Residual Chlorine Range: 0 - 10. Total chlorine test range: 0 ~ 10 ppm. 6 in 1 swimming pool test paper：.
eBay
4Groups 1M Alligator Clips Electrical,Insulated Test Leads with Alligator Clips,Double-ended Jumper Wires for Electrical Testing
Aliexpress UK
Clearwater pH Plus Increaser Pool & Spa Chemicals. ClearWater 1 Litre Clarifier for Pool & Spas. Clearwater Chemicals for Spas and Pools. Clearwater 1.5kg pH Minus Granules. Clearwater 1kg Multifunction Tablets are an incredibly simple way to maintain clear and hygienic pool water.
eBay
Metal Leeb Hardness Tester stainless Steel Alloy copper Hardness Measuring Meter HRC HL HB HV HS HRB Hardness Testing Gauge
Aliexpress UK
Tests: Total Alkalinity, pH, Cyanuric Acid, Free Chlorine, Bromine, Total Hardness. Tests: Nitrate, Nitrite, Water Hardness (GH), Free Chlorine, pH, Carbonate Hardness (KH), CO₂. Two test types – Choose Pond or Pool & Spa based on your needs.
eBay
20pcs Metal Alligator Clip G98 Crocodile Electrical Clamp Testing Probe Meter Black Red with Plastic Boot Car Auto Battery
Aliexpress UK
Test for Free Chlorine Level, Total Alkalinity and PH level. How do i know the optimal water levels for my spa?. For Free Chlorine, it is between 3-5 parts per million (PPM) for a hot tub and 1-3ppm for a swimming pool.
eBay
QSS 4-Wire Kelvin Test Lead Bottom Resistance with 4mm Banana Plug Orichalcum Plated Probes for Electrical Testing
Aliexpress UK
Struggling to maintain balanced pool water?. No more missing hidden risks! Perfect forevery water source you care about: drinking water (tap/filtered), fish ponds, swimming pools, hot tubs, spas, and even industrial wastewater.
eBay
Multimeter Probe Holder Test Meter Probes Clamping Tool Electrical Testing Power Supplies Ergonomic Repairing Accessories
Aliexpress UK
Total Alkalinity total alkalinity test range 0-40-80-120-180-240;. Perfect for swimming pool and spa. Ideal water quality is based on accurate water quality testing. Take it out and lay it flat. After 15 seconds, compare the reading with the color card.
eBay
BSIDE Intelligent Digital Multimeter, Voltage Waveform Recording, Temperature Testing, Current, Screen Can Rotated For Display
Aliexpress UK