Hanna HI736 Saltwater Aquarium Ultra Low Range Phosphorus Colorimeter - Checker® HC ATO graphite sensors reduces polarization effects

graphite sensors reduces polarization effects and does not oxidize for more reliable and accurate readings

the largest particle that should pass through when new is 200 microns

The second phase follows wit a surging motion to move the detritus into the overflow and out of the aquarium

Example: If you have a 35

Velcro mounting tape

Hanna HI736 Saltwater Aquarium Ultra Low Range Phosphorus Colorimeter - Checker® HC ATO graphite sensors reduces polarization effectsGet accurate results for your saltwater aquarium with our simple handheld colorimeter. Our ultra low range phosphorus colorimeter brings you more precise technology from your typical chemical test kit. Standard test kits have limited accuracy since they rely on the user to match colors. Our handheld colorimeter makes your life easier by eliminating color matching and providing you a direct saltwater phosphorus result. Take our portable handheld