Take 5-10ml of the sample, and take the supernatant for testing after standing. Nitrate nitrate test range 0~240. Nitrate Nitrite. Too high or too low PH is not good for fish growth. If the pH value is less than 4.4, the fish mortality rate can reach 7% to 20%.
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2 in 1 PH Chlorine Meter CL2 Residual Chlorine Tester Portable 5.5-9.0pH Test PH Chlorine Water Quality Detector For Pool
Aliexpress UK
Item is new but the packaging has seen better days which you can see in the pictures. Thanks for looking
eBay
3 In1 Moisture Sunlight PH Meter Soil Water Acidity Humidity Light PH Test Garden Plants Flowers Moist Tester
Aliexpress UK
Litmus papers are used to determine the pH level of a liquid and determine if a solution is acidic, basic, or neutral. Widely used for industrial chemical testing, science education, laboratory use, drinking water, swimming pool, spas, aquariums, and classroom analytical chemistry.SpecificationAccuracy: 0.3 pHTesting Range: 3.8-5.4Testing Paper Size: 54mmx9mm (L*W)Overall Size: 70mmx45mmx5mm (L*W*H)Packing List: 4 x Litmus Test Kit (80/Pack,320pcs)AdvantageThere are 8 color-coded scales that go from 3.8 to 5.4. Also can be used to determine the strength of acid and base, as we go from 5.4 to 3.8 the acidity of the solution increases.InstructionDipping the pH paper into a solution and observing the change in color of the paper. After one second, compare it with the standard color cards and read the pH value.
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Digital 2 in1 PH Temperature Water Quality Tester Backlight Hydroponics PH Meter for Swimming Pool Aquarium Measuring Instrument
Aliexpress UK
Take 5-10ml of the sample, and take the supernatant for testing after standing. Too high or too low PH is not good for fish growth. If the pH value is less than 4.4, the fish mortality rate can reach 7% to 20%.
eBay
6 in 1 Water Quality Test Meter BT PH CL TDS EC ORP TEMP Tester Digital Chlorine ORP EC TDS Temp PH Meter for Swimming Pool
Aliexpress UK
Not for ingestion.
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2 in 1 Temp TDS/PH Meter 0-9999 ppm Digital Water Quality Tester Temperature TDS PH Test Pen for Drinking Water Aquarium
Aliexpress UK
Test range for total alkalinity: 0 ~ 240 ppm. 💦This pool ph test kit has anti-VC interference ability，The accuracy is 96%. Take a water test in a swimming pool or spa. Available chlorine, pH and total hardness can be tested.
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4-in-1 Digital Soil Analyzer | Sunlight Intensity, pH Value, Soil pH Tester & Temperature Monitor for Gardening Plants Farming
Aliexpress UK
The color will show you the results. They are sturdy and consistent, so you can keep your pool water hygienic and clean. It's that simple. Size: as shown in the pic. Test Item: Salt. Due to the different display and lighting effects, the actual color of the product may be slightly different from the color shown in the picture.
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ZEXEF 1Pcs Pocket Size Digital PH Tester Mete Pen with 0-14 PH Measurement Range for Water Hydroponics Household Drinking Etc
Aliexpress UK
Take 5-10ml of the sample, and take the supernatant for testing after standing. Nitrate nitrate test range 0~240. Nitrate Nitrite. Too high or too low PH is not good for fish growth. If the pH value is less than 4.4, the fish mortality rate can reach 7% to 20%.
eBay
PH Test Indicator 10ml PH Tester Water Accurate Measurement Reagent Balance Balancer Fluid Meter for Water Aquarium Freshwater
Aliexpress UK