Well it has been one week to the day since I removed the 'Blackout' as part of my measure to get rid of the dreaded Blue Green Algae and.......I have to say that.......so far I am impressed, however...... For all the purist's out there I am sorry to say that so far in the whole week I have not added anything whatsoever to the water, just reduced the lighting to a few hours a day and cut down on the feeding regime. No CO2, no KPN, no Trace elements, no water change, no nothing. Everything seems fine so far :? But maybe I am riding my luck, no signs of any algae at all The plants seem fine and so do the fish. Here are some pictures I took tonight. Maybe I'll wait and see what happens, you know the old 'if it ain't broke don't try and fix it' routine Here's hoping. Steve.