The first page of the Tower Garden Growing Guide is "Important Safety Information" as well as "Safety Precautions" on the light kit instructions. There are warnings and safety instructions on the pH solution and the Tower Tonic as well. Use that as part of your curriculum.
I purchased live ladybugs from Amazon and they ate them right up!! I have an indoor tower with lights and the ladybugs stay in the room with the tower for the most part. Purchased 1,500 of them for under $10.
Hi efaust, IMO, in an educational / classroom setting (indoors or outdoors), starting from seeds offers the best learning experience. You may fin the following helpful: 17 Sources for Seeds and Seedlings http://www.towergarden.com/content/tower-garden/en/blog.read.html/en/2015/3/17_sources_for_seeds.html -- [please mark this post as…
Petco doesn’t know what they’re talking about. Koi need a lot of space to grow, and 20 gallons is way too small. The standard rule for fish is “one inch of fish per 10 gallons of water.” Even goldfish need that same type of space, and most fish also need sunlight. Best to come up with a different plan!