Welcome to our forum.
Vinny, I haven't been around for awhile, so if you posted what your water maintenance routine is I missed it. A few questions for you:1. What do you think is causing the brown ring?2. Do you have any unresolved water balance issues (pH, TA, Hardness)?3. Did you use a metal remover at fill-up?4. Are you using a clarifier?5. Have you tried a dirty duck/scumball/etc?
John, Do you have alka-seltzer like air bubbles in your water too? Vinny