D'you know, the amount of adults who have an aquarium and don't understand what you have beautifully summed up in half a page is ... staggering? I mean, I could forgive it if they weren't interested in aquatics, but somewhere along the line, they purchased the tank and the lives within ... and they seem utterly stunned to find that their ignorance doesn't somehow magically shield them from the consequences. I'm so glad that you are taking the time to teach these kids these basic but very important lessons.
On a lighter note, I would like to point out that their tank looks much better than mine do
I have no sense of aesthetics and know better than to try and make something pretty.