SPS Extension

Well I stiwched over my 65 gallon tank to me new 180 and its been about a month and everything seemed good until last week I noticed all my SPS polyps dont extend during the day just at night. They use to be extended all day and all night ph is at 7.8 -8.0 salinity 1.023 Alkalinity is 12 and my calcium is at 440 I have a aquaspace light with 2 250 watt 14k bulbs that i just replaced last week they are coming out slightly but not like they use to. I have read posts on the bored that other ppl have had the same problem and was seeing if anyone found a solution for this my procillaporra and millis are extended great along with all my LPS and zoos I replaced carbon and water changes. I have run out of options any ideas?
Thanks

Are you saying the bulbs are brand new?  What did you have before?  Mine closed up for a couple of days when I went from 10k to 20k bulbs.

my alkalinity is always between 10-12 dkh and all 11`of my different lps corals as well as everything else fully extends.

I have Ozone injected to my tank and keep my neptune controls it and i keep it at 350 to 375 sometimes raises to about 400 and I recently cleaned all the probes. I think I may try lowering my ALK a few points and see what happens. As far as the bulbs go they were 10K that were said to be around a year old and thought that could be the case so I changed over to 14K and still no change I even added a ground probe just to make sure stray electricity wasnt in the tank. All of this happened after the red bug treatment and I have done many water changes. Could that medication kill off benevicial bacteria also?
Thanks for all your input

I am having the exact same problem with my sps (excluding my green birdsnest). I have been told that not enough flow or circulation can be a factor in polyp extension.

I am in the process of setting up a closed loop on my tank to see if that will help or not.

Mg -> yes definitely.

Have you noticed a fish, like a blenny, nipping at them?

If it were stray voltage, everything would look bad. But... how much stray voltage is there? It's easy to check with a voltage meter. Hold one lead to the grounding probe, out of water, (for those without a grounding probe place the lead into the ground of a wall outlet) and stick the other lead in the water. It's normal to have up to 40 volts AC, but if you read much more than that, unplug things one at a time, until the voltage drops below 40. There is your culprit.

If you don't have a voltage meter, call me. I'll let you borrow mine.

Don't just unplug the ground probe and see what happens. Use a voltage meter and check it out. You know I live just down the street from you, right?

Have you checked PO4 and Mg levels yet?

In the wild, there are so many fish out n' about during the day, most SPS only open at night. That's why I asked if you have noticed a fish nipping at them. This needs to be investigated. Do you have a Clown Goby?

Edited by Mark Peterson

I saw more polyp extension when I was running power compacts during the day. Now that I have an aquaspacelight I don't think the polyps extend as well. I would blame it on the bright lights.

I have the exact same problem. I'm going to try adding another powerhead
on the opposite side of the tank which is on a wavemaker timer so each
powerhead gets a 15 minutes of action. Maybe that will help? I also just
bought a new ASM Skimmer but haven't hooked it up yet. I hope that will
help as well. I have a question though. If you don't see polyp extension,
does that mean your SPS is suffering from poor conditions and the growth is
stunted and/or it may die?