Okay..What I've done so far, is set up the tank, with the heater and filter and added the Aqua plus. Only problem is, on my filter (Fluval 2 plus) there seems to a cap at the top which makes the water coming out bubble or not bubble, whats best and why? I've put the heater next to the filter at the back left hand corner this is okay yeah? Should I do a test after I've added my Aqua as I did one before too? And finally when should I start adding Ammonia? Cheers!