There are two methods for fixing the probe; both methods involve simply snapping the probe in.The bracket mount is suitable for capless cylinders;For large tanks, we provide flotation material to enable automatic floating. For example, in a drain pump compartment, you don't need to worry about changes in the water level Effortlessly connect to your smartphone or tablet using our user-friendly app to get instant alerts and updates. Whether you're a professional aquarist or a home pool owner, this versatile and easy-to-use water quality detector is the perfect tool for keeping your water pristine Probe Usage Precautions: 1. It is recommended that the probe be submerged to half its full depth in water, placed in a calm area to avoid air bubble interference. When using in a saltwater aquarium, do not place the probe in the protein skimmer compartment. 2. Measurement Parameters: pH value, temperature, total dissolved solids (TDS), conductivity (EC), specific (), salinity (%, ppt), oxidation-reduction potential (ORP) 3. Applicable Scenarios: Freshwater aquariums, saltwater aquariums, hydroponic systems, fish ponds, swimming pools, etc. Color: As Shown Material: Aluminum Alloy Package Contents: 1*WiFi Water Quality Detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.