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Old 04-04-2012, 07:18 PM   #1
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Hammer & Frogspawn Corals Not Opening

First off, I am very new to coral & SW tanks in general - this is my first reef tank/SW tank. I bought a nice hammer coral from my LFS yesterday and it opened up somewhat yesterday after acclimation but never as full as it was in the LFS. Today I came home from work and it is not open at all.

Tank specs:
57 gal tank, 20 gal sump. Newly established (running for about 3-4 weeks). Stock is only 2 small percula clowns at the moment and some tiny hermit crabs.

Lighting: 2 AI SOL pods, set to 50% white 65% blue intensity. 3 hour ramp up from 0 to that, 4 hours at that intensity setting, 3 hour ramp down to 4% blue (moonlights).

Flow: eheim 1262 return and 2 Vortech MP10s running on ECOSmart mode during the day, night mode at lights out. Powerheads are each 4-6" under the surface, pointing roughly at each other, and set to ~70% of max speed.

Skimmer: BG NAC 3, collecting about 1/3 cup a day

All other corals seem to be doing fine and are all open: several zoa colonies, some daisy polyps, and a frogspawn.

Water Parameters:
0 NH4
0 NO2
10-20ppm NO3
0.12ppm PO4
9.8dKH
1.025 SG
460 ppm Calcium

So any thoughts? Too much flow? Not enough light? Too much light?

Thanks all!
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Old 04-04-2012, 07:24 PM   #2
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If they are getting too much flow they will stay closed up. Mine like a little calmer area. The flow should be just enough to sway them a little.
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Old 04-04-2012, 07:27 PM   #3
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Hmm ok, maybe that is it. It is moving around quite a bit - sometimes kind of violently. LOL Unfortunately I am not sure I have an area of lower flow. Maybe I didn't need 2 MP10s...

Given the way my PHs are setup, where should I find the lowest area of flow in the tank (for all you fluid dynamics gurus out there...)
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Old 04-04-2012, 07:29 PM   #4
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Quote:
Originally Posted by fort384
Hmm ok, maybe that is it. It is moving around quite a bit - sometimes kind of violently. LOL Unfortunately I am not sure I have an area of lower flow. Maybe I didn't need 2 MP10s...

Given the way my PHs are setup, where should I find the lowest area of flow in the tank (for all you fluid dynamics gurus out there...)
Im not sure how your PH's are setup, so i cant help that. What i would do, is point one up a bit more so you can place the hammer underneath. Maybe give it rock cover too
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Old 04-04-2012, 07:32 PM   #5
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They don't point up, they are vortechs... my initial post explains their setup, setting, speed, and the pic shows the location...
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Old 04-04-2012, 07:32 PM   #6
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+1 gboy, I have my lower flow stuff under the powerheads.
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Old 04-04-2012, 07:35 PM   #7
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Yeah, I think unfortunately with vortechs, there is a good amount of flow even under the ph's (maybe even more flow?). I turned them both down to 40%. It is definitely moving around less now, but still not "swaying". Maybe I need to set them up in a different mode, as the short pulse makes some great waves, but might be too much for LPS?
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Old 04-04-2012, 07:38 PM   #8
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Maybe when you feed, watch where the food goes and try to find a spot where it settles to the sand. That would be the spot for the hammer in my opinion.
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Old 04-04-2012, 07:39 PM   #9
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ahh, good idea.
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Old 04-04-2012, 07:53 PM   #10
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It could also be that it is still a tad stressed from the move. Changing the flow, if possible, will probably help though. In terms of LPS not liking alot of flow, that isn't always the case. My duncans weren't doing well until they had a 750 pointed almost directly at them.
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