Jarrett, I am so glad you are going to do Aquarena! Don't worry too much about the tests, you'll do fine. And if you need to adjust your weights they are patient. You will be slightly more bouyant due to the calcium deposits in the water there. As for the fins on the ground, I found the only thing that really works for me is arching my back while diving; if you come up with a good solution let me know! I don't think I'll be able to be out there this weekend due to other plans but when you are a Scientific Diver just PM me and we can dive together in the springs!