I finally bought a RO unit!

Last year, beginning in late fall, I had a major hair algae and red slime outbreak. The nitrate levels were off the chart. By late January, the levels dropped and the tank was crystal clear looking beautiful! That is how it was through spring and summer. However, around late august a few patches of algae began appearing again. Not much, but a little.
By October the hair algae was out of control and my corals were dying off fast! I checked the nitrates and they were off the chart again. I performed several serial water changes over the next few weeks but the levels did not go down much. I decided to check the levels in the water I use and found them to equal the levels in my tank. At this point I was at 80ppm! That is how high the city water was. Thinking this was too high even for city water I referred to to the water report. They claim the permissible limit to nitrates is 10ppm and claim the water in my town tests at 7.4ppm. Funny, my test kit says the city water is above 80ppm. I called the city and they say the water is testing normal and my kit must not be accurate. My hair algae level begs to differ.
Fortunately my phosphates are not detectable (I use GFO). The city levels are now down below 20ppm (according to my kit) and my tank levels are the same. I cleaned almost every inch of my tank and got it looking good for now. The corals that survived are starting to look good again. Unfortunately I lost some nice corals /DesktopModules/ActiveForums/themes/_default/emoticons/sad.gif
Lesson learned....I purchased a 6 stage 150 GPD RO unit with 2 DI chambers. I will add that to my current carbon filter to make it a 7 stage filtration unit. I am also adding a sulfur denitrator. I tried dosing with Vodka but did not see any detectable difference after 8 weeks of use (slight increase in sludge from my skimmer however).
Now I just have to get the thing hooked up and stay ahead of the nitrate level. My next adventure will be a custom LED system to cover my 72" 135gal tank. I need shimmer!
Wish me luck!