I have a thin brown film that gets on the front of my tank. When I use my mag float it seems to be powdery. I have tested for phosphates and I have 0
I use RO
water comes out less than 5 on my tds
. My lighting is
4 165 watt VHO
. Blue actinic on 9:00am Whites come on at 10:00 am. Whites go off at 7:00pm and blues go off at 8:00 pm.
What can be the cause of this or is it just normal. If I leave my tank for 3/4 days the whole front of the tank will be covered with the stuff. The tank has been up since September of 2004 and had the normal Diatom outbreak but it seems like I still have some issues.
I also have a 40 gallon refugium with chaeto and liverock. The lighting for that is on opposite of the display tank