I recently set up a DIY AIO 20L and found a used 36" 4 bulb T5 w/ actinic LEDs down the center. I have gone with two ATI blue plus, an ATI aqua blue special, and an ATI purple plus. I have this over the 20L about 12" above the water line. Tank is only 12" deep. I intend to use this tank as primarily an SPS grow out tank with some zoas/palys also. Maybe a few high end Acans also. My current lighting schedule is below:
12:00 - 8:00 PM - Actinic LED on
1:00 - 7:00 PM - Blue Plus, Actinic LED
3:00 - 6:00 PM - Aqua Blue Special, Purple Plus, Blue Plus, Actinic LED
6:00 - 7:00 PM - Blue Plus, Actinic LEDs
7:00 - 8:00 PM - Actinic LEDs
I am new to T5 lighting, so I am unsure if this is too much or not enough. Anyone have any insight they would like to share I would welcome the advice. Thanks guys!