Hi all! I got my 9gallon tank last night and set it up, now i have 20lbs. of ls and 3lbs. of lr, is the 3lbs. enough to kick start my cycle? I plan on adding more later, lr at my lfs was 7.00/lb, and i'd like to try to find it cheaper (though that may not be a possiblity). My SG is normal, my ph...