corals and 7.8 PH

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skyfish

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Hey everyone I just had to question about the ph of my and some corals I have. My parameters are as follows

ph-7.8,
salinity-1.024,
ammonia-0 ppm,
nitrites-0 ppm,
nitrates-2-4 ppm,
calcium-520 ppm,
Alkalinity- 8
Phosphate-0 ppm

I've had the tank running for about 3 months now and seems to be doing well. I have a pulsing xenia, Orange montipora, green star polyp. Ive had all of them for about 1 1/2 months now except the gsp. I've had the gsp for 3 weeks now. When I put in the montipora it was a very nice light Orange but after a week or so it turned brown and seems like its not growing. It still slimes up so I'm thinking its still living. My question is what could I be doing wrong? The montipora in the lfs is still bright orange while mine is brown. I used to see the little tiny polyps on it come out but not anymore since it has turned brown, I don't even see white edges indicating new growth. Help me out guys Ive been racking my brain as to what it could be but cant figure it out.
 

lanlesnee

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I'm still a beginner at this so take my advice at that.

Sounds like it's not getting enough lighting. What kind of lighting do you have? Have you tried moving it to a brighter spot? Hows your water flow? Should be a medium flow.

Your ph is low. It should be at least 8.1. Your calcium seem on the high side also.
Are you adding calcium? May want to cut back. What is your stromtium level. This is one of the trace elements your montipora needs.

What is your water temp?
 

ATP

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Your corals should be able to live in 7.8 for ph. My always drop.

It could be ligthing light lanlesnee said. Waterflow shouold be mediumto high. Prefer high since its an SPS.

I don't check stromtium. Its not a required parameter to check and water changes should maintain it. The test kits are also very hard usually. Instant Ocean usually have strontium levels of 15ppm I headr and that's already above natural levels.

Another test that would also affect is magnesium. Magnesium IMO, is required to be check and is one of the main parameter to check in a reef tank.

-ATP
 
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skyfish

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I have a t5 4 light fixture 2 actinic blues and 2 12,000k bulbs. I did the whole putting them in the lowest part of the tanl the slowly moving then up higher but the first week i had it is when it did the little color morph thingy.
 

sgh360

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7.8 PH has always been in my tanks with LPS and Soft corals and they have been very happy and growing like weed. Many reef tanks with sumps have PH swings during the day their ph is around 8.3 and at night 7.8.

Many times coral lose their color because Shock of water parameters. What type of acclimation did you use and for how long?
 
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