Hi I've got a quick question. Has anybody got this CO2 kit: http://cgi.ebay.co.uk/CO2-Complete-...QQptZUK_Pet_Supplies_Fish?hash=item20afee6071? Or can speak german and can give the instructions a quick look for me? http://www.lunapet.net/Anleitungen_PDF/CO2_Nachtabsch_solenoid_D.pdf The instructions for how to set it up are in english except for the part I'm stuck on - the solenoid. I can't work out how to attach it or if it matters which way around it goes- do they have directionality or is there just a clamp mechanism in them? It has an arrow on it so should I just follow that? Cheers for any help. I had a disturbing incident at work with a gas pressure valve going of and sounding like rapid machine gun fire that has made me pretty twitchy around gas bottles/regulators and the like. I think it says a lot about my tank obsession that I went and bought one for my home!