Thanks for all the input guys! I really appreciate it! I do lightly vacuum the sandbed when I do water changes. Usually just the first couple centimeters. My CUC consists of a SS starfish, about 10 nass snails, 3 turbos snails, 5 astrea snails, 5 zebra herms, 4 blue herms, 4 red herms and 4 pompom crabs(not sure if they count as CUC since they sweep the water with the nems). I'll keep up the weekly water changes though untill things start to level out. Also, I will make sure not to treat the NO3 with anything until I get a better grasp on the issue.