1)   Water Test (Langelier) 1.1.8
This program uses the Langelier saturation index to balance the water. This is a very accurate and effective way of balancing water. Now with built-in Access database for recording and reporting test results.
Water, Test, Langelier, Chlorine, pH, Hardness, Alkalinity, Calcium, Salt, pool,

 2)   hydroponic nutrients 1.1
Hydroponic tool to help you diagnose nutrient deficiency. read the descriptions and use the pictures to help keep your plants healthy.
Potassium, nitrogen, calcium, phosphorus, copper, chlorine, nutrient, deficiency,