1 A do-it-yourself approach for basic basement steps starts around $250-$350 for materials, and takes about 3-4 hours. 2  That's with standard lumber, such as pine; costs can go much higher with more expensive wood, such as oak.
Pour enough melted agar into each sterile plastic petri dish to cover the bottom - about 1/8 to 1/4 deep. Replace the lid immediately. Place agar plates on a counter top to cool and set. Agar medium will set like stiff gelatin at room temperature. The agar medium is now ready for storage or use.
Agar Agar Side Effects. Agar Agar, CAS# 9002-18-0, is a gelatinous substance manufactured through plant extraction, available as white Powder. Agar Agar is widely used as thickeners. It is widely accepted as safe food additive in many countries with E number E406.