Once you design your own classroom planted tank community using my FREE download 'How to Set up and Aquatic Ecosystem Model', and have purchased fish (preferably livebearer species), snails, plants, freshwater shrimp, general Master Water testing kit, and other supplies from your local Fish Supply Store - this is the entire collection of Labs for both lower and upper levels that I've designed, tested in the public classroom, and refined over several years. Once your system is set up, and you hav