I need help with the connectors on my resin bottles. At present I use Hozelock connectors but in the past few weeks I have used brass ones and aquastop ones but they just all seem to leak. I have read on here that John Guest produce really good connectors but which ones would be suitable for my bottles. I have attached a picture to give you an idea of the sort of bottle I have. The connectors have to be able to connect to normal sized garden hose diameter as that's what I use for my tank.