Chalices receeding!!! Please Help!!!

[Reefhabit]

A client of mine is having some issues with some of his chalices. These are mostly tank raised chalices like Oregon Mummy Eye, and Pink *******. 90% of them are all fine except for a few of them are losing skin around the edges.
Parameters are the following:
Calcium 450
Alk 8 dkh
Mg 340!?!? Too low right!!! I told him that Magnesium should be around 1300. Told him to make sure.
pH 8.0

I also read that some LPS will let go of its skeleton base if Molybdenum is deficient.
The tank is pretty loaded up with echinos. Could it be enzymes released by corals that are trying to fight off other encroaching corals? I told him to run some carbon just in case.
I also wanted to know if you all think this is LPS Eating Amphipods? If so how much Interceptor should I dose for a 90 gallon reef?
Please help cuz I feel sorry for this guy. Has a ton of super rare high end stuff in there.

 

[swannyson7]

You should raise your mag, but don't go too fast or it will do more damage than good.

 

[Macropora]

Mg at 340 is very low. Lol, it's even lower than natural sea water or any sea salt mix. Everytime the mg drops below 1300 ppm, I've noticed some of the more delicate chalices in my system starting to recede around the edges. They usually come back after a month or two...

 

[fraggardner]

ithat mag is super low go buy bulk mag its so low if u were to use kent tek m it will take ton$ (Gallons) depending on the tank size oh yea and good luck and happy reefing

 

[soccerbag]

Agree with everything above. Hard to say if it's a parasite or not. But the Mag is WAY too low. I find my chalices do better with Mag over 1350. If there is recession, is your client looking at the tank at night when the chalice sweepers are out? If some chalices are too close together (as you know), they can do some damage. If is gets worse, he may want to do a dip with some Lugols. This may help with the recession. But sometimes, they are just going to receed and there's nothing you can do unfortunately. Hope things get better for him.

 

[dougers31]

My question would be would it be possible to have cal levels over 400 if your mag is only 340??? I would test again.

 

[jledon4]

the deal with cal and mag is that after a 3:1 (Mag:Cal) ratio, i believe that after that you can't raise it anymore, the only way is dosing like crazy. for example, if your cal is at 450 then the mag should be at 1350... +1 on raising it slowly.

 

[Alpha Aquaculture]

i would def test the mg again. wouldnt want to raise it too much if the test was in error

 

[CJO]

+1 on the retest and use a different kit. Something doesn't sound right.

CJ

 

[_Alex_]

maybe he ment 1350??? i have nevre seen a mag that low! just mixing up most salt mixes test out higher than that!

 

[EASTCOASTREEFER]

I would check phosphate,nitrate levels as well. High phosphate levels will cause more damage to chalices than low mag or calcium, its usually the first sign of recession.a good supplement for your system to enhance levels is microbe lift essential minerals & trace elements it is packed full of ingredients and will raise levels slowly so theres no shock to the system.

 

[lsingh]

i suggest use a different test kit to test all ur water parameters....every thing else looks fine but the mag....it cant be that low if every thing else i stable...whats ur salinity..check ur amonia or nitrites...how often do u do ur water change...could be phosphates...???

 

[Reefhabit]

Agree with everything above. Hard to say if it's a parasite or not. But the Mag is WAY too low. I find my chalices do better with Mag over 1350. If there is recession, is your client looking at the tank at night when the chalice sweepers are out? If some chalices are too close together (as you know), they can do some damage. If is gets worse, he may want to do a dip with some Lugols. This may help with the recession. But sometimes, they are just going to receed and there's nothing you can do unfortunately. Hope things get better for him.

I asked him that and he said they are not stinging each other. I think it is magnesium too. There were many of times where my buddies had a receeding chalices and all I did was put it into a different system or do a large water change and that helped.

 

[Reefnjunkie]

I am sure you know this but to be safe, dont raise mag motr than 100ppm in a 24 hour period, I would not go more than 75 unless you/he know the EXACT water volume-error on the side of caution.

The params you posted (another assumption) those numbers have been like that for a while (loooking at stability)

I think I saw someone saying to retest the Mg, even if you never did a water change I have a hard time believing that the mag would drop that low