I have tried everything to stop the growth of brown algae. First, my tanks are years established just so I don't get ten responses "it's common in New setups and will clear up"'. Also I have timers on all lights and no direct sun light and lights or no lights I have this algae. I have river rock in my childhood tanks and cleaning it is not only time but a task I dread each week. I don't like the appearance of it so I do it but it's the one thing I hate to do. I do have high phosphorus in my tap water and tanks. Tried phosguard didn't bring it down and with it in my tap water it would seem to defeat the purpose because doing my weekly water changes just puts mire phosphorus back into the tanks. Anyone else have this problem? If so have you found a solution?