Any ideas why and how I can stop this from continuing?

Get a timer for your tank lights. It's worth it, even if you never leave the
tank again. Plants do best with a regular schedule.

Sounds like you're on the right track to fixing the current problem. Make sure
the plants have enough fertilizer and CO2 when the lights go back on.


Leigh

http://www.fortunecity.com/lavender/halloween/881/