All my LPS have been closed up for weeks but SPS are doing fine???

Frogspon

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salinity is 1.025,
temp is 79,
ph is 8.3,
alk is 8.4,
calcium is 400,
magnesium is 1250 ,
ammonia 0,
nitrate ~5,
nitrite 0,
po4 is .03.

Can't figure out what is going on, I've been trouble shooting for 2 weeks now.

All of these corals (frogspawn, hammer, torches, acans, ricordeas) have been happy in my tank for at least half a year and all the sudden with no change to flow or light they won't open up anymore.

Any tips on things that can pi$$ off LPS? Now a huge colony of GSP is even starting to close. I can't figure it out?
 

Preacher

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Just take one person's opinion here....but I think LPS do better when the magnesium is higher. Ive seen some tanks (under 100g) running at 1500 mag.

As I said, just an observation....please wait for others to comment.

Preacher

Edit...video from a Reef Store in Toronto. They do a live dosing. If this sounds like your problem, give it a watch.

 
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