Hi, I have now an Aquatek Co2 regulator with six outlets but I have to say that I'm not happy at all with this product. First of all, the working pressure can't be adjusted, wich means that every time you open or close any of the outlets, the output on the others changes dramatically; for me, that's a big deal. I need to make adjustments almost daily and I can't be able to have constant Co2 levels on any of my tanks. Many fish have suffered this and ended up dead. I need advise on building a very high quality regulator, I've read here that rex or Sumo is one of the best choices but do they offer options for more than one outlets? I need six at least, and I need each to be very accurate. Tom says that this is one of the things in what you should invest more money, I'm paying the price for going cheap at first; so I agree with him. Can you help me? Thanks a lot, have a nice day.