hi guys I've been keeping planted tanks now for a few years and I havn't had this problem before. my regulator is becoming hard to regulate. I'll set the needle valve to the right bpm's and a few hours later its off like a rocket and has dumped a whole bottle of gas. do I just need a new needle valve or whole new reg. and where can I get a new one from. Its done 3 bottles in a few weeks thank god its a betta in the tank other wise the live stock would be dead