It's not that I'm against the rodi unit, I believe you guys when you say it's for the best. I'm just looking at my options that's all, I do appreciate the info I have gotten so far. As for the tank, all is well. Levels are all fine .. I test ph, ammonia, nitrite and nitrate. Considering I have no coral yet should I be looking for anything else? When I do start w coral what do I need to test for? Again I'm very thankful for all the help. PS.. absolutely fish on rt46 in nj has a 20% off sale July 4,5 and 6. Going to check it out.