photo period

I recently switched lights - from one black box to another on my 40G Breeder. Since the switch - approximately 3 weeks ago, I am noticing a persistent growth of algae on top of rocks. The algae is easily removed with brush... I am working to reduce nutrients with regular W/Cs bi-weekly. My...

This is my first post I need some help programming my hydra 26 hd. I have 2 over a 90 gallon tank. My tank is pretty much all LPS with some softies and one monipora. All my parameters are okay I am just trying to figure out where to start out with my settings. Lights have been on the tank about...

I know in the world, at the ocean, there is no 24x7 sun. I'm not sure if this is true but I have 'accidentally' experienced this for 2 times, where if the corals are exposed to extended lighting time, seems like they are saying 'enough is enough'. For example today, I've decided to open up the...