Looking for livestock ideas for office nano

[ScubaSteve]

I am planning on very regular, sizable water changes (seeing as how the RO system is 10 feet from my desk) to keep nutrients down (I have some tricks here). Also, I have a limitless supply of lab grade chemicals (calcium chloride, etc) and a pile of small peristaltic pumps. Dosing would be super easy for me to set-up if needed. I want to see if I can do without it though.