my brother was unable to get a grant for his life science classroom. the grant board in his county said it wasn't an efficient tool for teaching! seriously! i think that is totally bogus and so does he, so we arent' giving up. we'll pay for as much as we need to but was wondering if you guys have any old filters or tanks or anything that might help us out. We think it's important that people learn and understand this hobby for it can be around forever. all we can do is plant a seed. thanks.