Hi all, I decided to set up a 10 Gallon (another one.) as an emergency tank. (Was given unwanted fish by a moving friend.) But this time, will be using Tetra SafeStart to get a cycle going... I bought a bottle (Tetra SafeStart PLUS) about a week ago, and didn't know what to do with it, so basically I put it on the shelf, half of it is left. So my question is, how do I cycle this tank using this product? Is the bacteria still alive? Or? How can you tell if it's alive? And not a faulty bottle? Is half a bottle enough for 10 Gallons?