Lights!

[Flaxon-Waxon]

Ow many hours should you keep lights on for during the day while the tank is cycling? T5 HO 4 bulb, 2 blue, 2 day, FOWLR tank... Thanks everyone!

 

[AquaRick]

If you're cycling, keep the lights off. They'll only promote algae growth. The BB don't need the light.

 

[Schism]

If you're cycling, keep the lights off. They'll only promote algae growth. The BB don't need the light.

Yep lights off. Light serves no purpose during the cycle with no livestock. Just grows algae as the nutrients build.