This hydrometer has an easy to read 2-color scale with a safe zone, improved no wet hands design, extra wide stabilizer base, accurate to +/- 0.001, full range scale from: 1.000 to 1.032 in .002 increments except in the safe zone, there it is in .0001 increments (specific gravity), 0 to 40 PPT in increments of 2 (salinity).

The Salifert Calcium Test Kit is capable in resolving the calcium content in 10 mg/L steps. The color change is sharp and facilitates the detection of small but highly significant fluctuations in the calcium concentration. Salifert is the only one in offering a true accuracy and precision as claimed.

Salifert Phosphate Test Kit offers highly reliable and informative phosphate measurement crucial for timely corrections. Even in low concentrations, phosphate can compromise water quality as well as the health of aquarium inhabitants. The Salifert Phosphate Test Kit detects phosphate-phosphor in two different ranges. The mid-range test is ideal for routine testing and low range is designed for scrupulous monitoring of reef aquariums. 60 tests. For use in marine, freshwater aquariums, and water garden ponds.

Combine several valuable water tests into one handy kit with the 5 in 1 Test Kit. This highly convenient kit uses simple test strips to determine your aquarium water’s pH, harness, alkalinity, nitrite and nitrate concentrations. Ideal for use in both freshwater and saltwater aquariums.

I really like this controler. I use it with my calcium reactor in saltwater aquarium and also to control pH in freshwater planted tank.
The first reason why I chose to go with this model is because of it’s price. I could not find a better deal with other brands…