are my lights on to long

[iceman86]

Post a pic. I had the same issue and I upgraded my skimmer and flow and the amount of crud that came out was unreal. I even tried chemi clean and it didn't work. I thought it was cyano at one point cuz it's looked crusted on the sand and slimey. Been a couple weeks now and nothing's back yet. Actually little spots I had are all disappearing. Check your phosphates too.