KELVIN® Classroom Hydroponics System™ Food in the Desert or Antarctica Project for Your Class (Grades 4-12). Hydroponics technology makes it possible for people all over the world to have access to fresh crops in controlled environmen ts even if they don't have good soil. Explore these... MSRP: Was: Now: $495.00 Add to Cart
KELVIN® Introduction to Hydroponics Booklet This basic booklet explores hydroponics systems and techniques. Includes a timeline, background information, glossary and hands-on activities. Black and white illustrations. Booklet, 24 pages. MSRP: Was: Now: $5.95 Add to Cart
Rockwool Cubes Rockwool growing medium can hold large amounts of nutrient solution and air for the best growth. Does not decompose. 1-1/2 x 1-1/2 in. cubes. 98/pkg. MSRP: Was: Now: $24.95 Add to Cart
