I have acquired a co2 kit for my pllanted tank which is approx 340litres UK. I have a co2 2kg carbon dioxide fire extinguisher and a co2 supermarket regulater with a solonoid. It's a doul gauge regulater showing the tank psi at around 800 and outlet psi 58 or so. It has a bubble counter attached to regulater and I'm counting roughly 2 bpm. I'm quite nervous of doing something wrong as the tank is fully stocked with nano fish, does it sound right?