Thanks for all the help so far guys, I've stopped the nopox and have been blacked since lights out Sunday night. I'm planning on restarting normal light schedule tomorrow morning. Would a 4th day blackout be a bad idea? The new RO filters are in the mail and should be in tomorrow afternoon. Should I dose any peroxide to try and assist the blackout? Lastly I can't find any chaeto, I've checked checked 2 places both about 1.5 hours from my house. I live in the Outer Banks of NC. Next closest place is the Chesapeake/VA Beach area, no if anyone has any?