Hi, I'm new to the site, and a rookie fish keeper, and not sure if I have my first problem. Basically I set the tank up 2 mths ago and cycled it for 1 month, I then added 4 x mollies 4 weeks ago, 2 x golden sharks and 3 Bala sharks 3 weeks ago, and then 4 clown loach 2 weeks ago, I have a 180l...