Is this stress or natural?

Jhoussock · Jan 8, 2019

so fairly new to the world of corals and everything seems to be going ok...which gives me time to worry about nonsensical things! I notice around 5 or 6ish sometimes my lps and zoas etc start to hide or shrink in size. My lights cut at 8:00 with a ramp down in intensity from 7-8. Lights come on at 10 and ramp up to full intensity by 11. So from 11-7 they get higher light. Are these buggers that clever that they know the time is coming soon or are they getting stressed by the amount of time the lights are at higher intensity so they are closing up? Thanks in advance for any input!

Johniejumbo · Jan 8, 2019

Jhoussock said:
so fairly new to the world of corals and everything seems to be going ok...which gives me time to worry about nonsensical things! I notice around 5 or 6ish sometimes my lps and zoas etc start to hide or shrink in size. My lights cut at 8:00 with a ramp down in intensity from 7-8. Lights come on at 10 and ramp up to full intensity by 11. So from 11-7 they get higher light. Are these buggers that clever that they know the time is coming soon or are they getting stressed by the amount of time the lights are at higher intensity so they are closing up? Thanks in advance for any input!

I’m gonna follow along. Mine seem to do similarly. A couple hours before lights out they will sometimes close up then reopen. It is curious

Hemmdog · Jan 8, 2019

Yea they know the time, via nutrient level, micro pH swings, and ramp down of lights helps lol. Mine do it to, you will really notice it before and after day light savings time switch.

Jhoussock · Jan 9, 2019

Well they do it before the ramp downs which is why I thought it was interesting....the rest makes sense though! Thanks for the input!

Jhoussock · Jan 9, 2019

Johniejumbo said:
I’m gonna follow along. Mine seem to do similarly. A couple hours before lights out they will sometimes close up then reopen. It is curious

Oh you know what that’s true here too....some do close and reopen...wonder why?