Lighting/sps Q

[Proteus]

Originally Posted by kien

I don't think I quite understand what you mean by two photo periods. Do you mean your lights are on during two different times of the day? Like 6 hours on, then 6 hours off, then 6 hours on again ?

Yep exactly. There 6 on 6 off right now

There's alot of literature that sps only need 4 hours of intense light. Once photo saturation has occurred the light is wasted.

There was a study done in Hawaii on this since they have seen 40 days of rain with little to minimal light.

Lps on the other hand has shown slightly negative effects losing to much Zooxanthella.

I did this before with good results. As of now the lights are 6 hours @20k 6 off 6 hours @14k 6 off. Would like to take the 14k cycle and turn to 10k but not sure if it would shock the coral