Finally got the cycle started in the 2.5 but today the filter started making a loud noise So I put in more water, thinking maybe the water level was too low, but it's still making the noise. It's unplugged currently and I guess I have to return the tank... which would mean starting the cycle completely over I just made a new cover for it last night and was considering putting decorations in, glad I didn't! If it's not one thing it's another... It's the National Geographic Half-moon Aqua Oasis, has anyone else had this tank and experienced this problem? And if I return the tank, should I try and keep the filter media? should I save the water? What tank do you all suggest?