to light or not to light

[tnr]

wondering how many people use lights on thier sump.I've been thinking of add light to my sump.

 

[lordofthereef]

You only need lights on your sump if it has a refugium.

 

[wamp]

If you want to run a reverse daylight on your sump to better maintain Ph you do not need a refiguim. It will not affevt it greatly if it is not a big sump but at night your ph falls and if you have lights on it it will help hold it..

 

[luke]

If you have something growing down ther (or would like something growing down there) then light it otherwise don't waste the energy.
As for reverse daylight, it is a great method to maintain pH. But you need something growing for it to have an effect! The way it works is through photosynthisis; turning the CO2 into O2 thereby maintaining pH. High levels of CO2 cause low pH. (that is why people inject it into CA reactors)
Luke