well i went out of town for 10 days and this was right after treating for ich. killed most of my plants at the time. I had to remove all water lettuce, wisteria, and ludwigia. I have replanted (pics in my 20 tall profile) with bacopa, moneywort, crypt spiralis, crypt parva and madagascar lace. I am still getting the diatoms and only dose root tabs for the sword and lace. co2 runs with my lights (6.5 hours a day). any suggestions where to go from here. LFS recommended RO but after reading in to it, it sounds a little scary. thanks guys.