Could a compromised magnet be poisoning my sps?

I had mp40 magnets cause major problems. Get a triton test done to help rule out other things.
 
With corals so close to each other like in last pic looks like sps verry close to brain
brain wins battle and sps dies watch tank verry closely at night
 
With corals so close to each other like in last pic looks like sps verry close to brain
brain wins battle and sps dies watch tank verry closely at night

If it was just that piece, I would totally agree with you. Unfortunately it's happening all over the tank.... The chalice rarely extends it feelers as well.

That chalice was actually dying when we transferred into this tank. Looked like hell for months. And then it took off. Has probably grown 3 or 4 inches all the way around in the past 6 months or so.
 
I'd say do a super large waterchange and then make sure you have po4 in the system. If you are that close to undetectable with a good skimmer and a fuge then you might be out competing your corals for nutrition. Your corals look colorful brown. I've seen stn like this from pests, too low nutrient and too high nutrient. Usually too high and they rtn more often. As far as kessils are concerned, are the coral colonies you have now grown from the kessils?


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I didnt read every response, but the short answers are:

1. Yes, a corroding magnet can poison your tank
(looks like another fine Two Little Fishies product killing coral, their magnet rusting issues are well known).

2. The difference between a magnet corroding/breaking down and GFO is that one is pure ferric oxide (GFO), but a magnet can contain all manner of metals that can be harmful to the tank, so when a magnet starts to corrode and break down, it can expose the tank to those metals.

I have spoken with Julian Sprung about the magnets and he maintains that it is not an issue, but they can not guarantee that their cheap magnets do not contain other metals, and as long as they refuse to pot the magnets in epoxy, they will corrode and be a risk to the tank.

The simple solution is to not leave your lettuce clip or nano-mag magnet in the tank all the time.

To recover, I'd run GFO, cuprisorb, and carbon, and do some water changes. Then be patient.

Oh and DONT run a ton of GFO or carbon all at once, it will drop your alkalinity and be a shock to your system inhabitants. This problem took a long time to get bad, and unfortunately it will take a long time to get better. patience.
 
I would strongly suspect the magnet. I had the same thing happen. An Avast Marine probe holder rusted, wiping out 80% all of my SPS over a period of two months or so. It appears that the coating used on the magnets or the magnets themselves contain tungsten which dissolves in the water and is very toxic to SPS. There is an article in Coral Magazine about tungsten being used in cheap Stainless Steel (thinking it came from my pump impellers, I changed them all out but the problem persisted until I found the rusted magnet). A triton test confirmed that I had high amount of tungsten in the water. Neither carbon or poly filters helped bring the level down. Ultimately, it took 10 or more 20% water changes over a couple of months to bring down the level such that the remaining SPS stated to look happy again.

I would start with a triton test and see if you have high tungsten or another heavy metal. If so, you should do as many water changes as necessary to bring the levels down the NSW.
 
It's been a week and I'm already seeing great improvements. Excellent polyp extension,color returning and all stn has stopped. I have been adding microbacter as well as Prodibio to replenish the bacteria. All I did differently was remove the rusty frag rack, 5 gallon water change and added Chemipure. Oh the lessons we learn are costly in this hobby.
 
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