I'm going with Kidreef, my GSP's and Monti's grow like crazy, definitely fastest growers in my tank. Good luck with your science fair project, are you just going to measure growth rates or what? Any other variables involved? How many tanks will you be using? Maybe I'm getting too involved, just curious. Wish I could have done something like that when I was in school 20 or 25 yrs. ago. Sounds really cool and fun for you in the process, makes it so much easier to do something you have passion for, than doing something on a whim or maybe what others may want you to do. Rock on, and if you put forth real effort, you should do really well. What grade is this for by the way?
Matt