This kit measures for acidity by using the phenolphthalein endpoint to determine hydrochloric, sulfuric, and phosphoric acids. Range/sensitivity is 1 drop = 0.1 or 1.0% (as the particular acid).

This kit tests for pH using the Octa-Slide 2 Comparator ranging from 7.2 – 8.6 pH.

The Nitty Gritty Soil Science kit is a great introduction to the basic concepts of soil science. Instructions for cool science experiments and Just for Fun activities, games, and internet connections are included.

Investigate healthy plant requirements for proper soil texture, ideal levels of soil pH, and nutrients. Learn to properly care for plants and perform pH, nitrate, phosphate and potassium soil tests using non-hazardous TesTab methods. Reagents for ten tests for each test factor are included. Make friends with earthworms and discover the importance of composting! Recommended for green- and dirty-thumbs ages 8 and up.

Ideal for examining water quality in known or suspected polluted aquatic environments.

• Individual test modules for 7 key test factors
• Complete instructions
• Reagents to perform 50 tests for each factor
• All necessary apparatus
• Three handbooks now available as a download: Study of Water Quality, Our Environment Battles Water Pollution, and Investigating Water Problems
• New field-friendly tote

Explore what’s coming out of your funky faucet! Test tap water for pH, chlorine, hardness, copper, and iron. Learn while you laugh with Just for Fun activities including Make Your Own Lava Lamp and edible experiments like the Pollution Parfait. Non-hazardous TesTab reagents, test tubes, word search game, internet connections and instructions for simple water quality tests also included. Perfect for sink scientists ages 8 and up.

This Alkalinity test kit provides total alkalinity readings only, using a Direct Reading Titrator. Testing range/sensitivity 0-200 ppm/4 ppm as CaCO₃.

This pH test kit tests for pH using the Octa-Slide 2 Comparator ranging from 8.0 – 9.4 pH.

An abbreviated version of our popular Model AM-41, the new Model HP-1 offers tests for pH and three key nutrient factors: nitrogen, phosphorus and potassium. It allows the hydroponic hobbyist to maintain proper nutrient balance and to achieve optimum growing conditions in soil-less cultures. Reagents sufficient for 50 tests per factor and complete labware are foam-mounted in a sturdy carrying case. Instructions and 75-page hydroponics handbook are supplied.