First the important stuff:
Tank stats:
ph: 8.0
ammonia:0
nitite:0
nitrate: 80 (20-40 out of tap)
temp: 26.5c
size: 115gal (approx)
water changes: 10% a week, sometimes every other week if I forget.
fish: mollies, 10 black phantom tetra, red fin shark, blue acara, (killer snails?)
OK guys got...