Join Date: Jun 2008
Location: Orange County, CA
If you don't have plants, sure. Otherwise I don't because it seems to give algae a free day to grow. Although the light is off, the tank still gets ambient light, and low light algae can grow. I think it's best to keep things consistent because algae can adapt to conditions far more quickly than plants. Plus no light means the plants aren't producing any O2 for the fish to breathe or keeping nutrients away from algae.