The only update I have is that I'm probably done with reefing. I've lost about a third of my colonies, the rest are on their way. Even the few that seemed to have avoided the initial round of damage are now falling apart. Cyano has taken hold everywhere dead skeletons are exposed, and the tank generally looks like garbage.
I was never able to do a 100% water change, I'm just not set up to do that logistically. Starting today I'll be doing 50 gallon water changes every day until I've replaced the total tank volume 3 times over. I don't know what else to do.
I can't make sense of my test results. When this started, my alk spiked up past 9. I thought maybe that was why the tips were burning, though now I think it was a symptom, not a cause. I reduced the rate at which I dose alk solution by 40% over the next couple of weeks and my alk has stabilized at exactly 8. However, my calcium simply will not budge. One of the changes that preceded this carnage was a switch to bulk calcium that I picked up from Eli. I'm now dosing 180 ml of that dissolved at 1 cup/gallon day, which is 20ml more per day than I was dosing when my tank was robust, healthy, and growing rapidly, but the calcium levels won't move above 355ppm.
Mag is 1300.
So, while these levels aren't perfect, an alk of 8, calcium of 355, and mag of 1300 should not also equal this much carnage. Even a swing of alk from 7 to 9 or 9 to 8 shouldn't be enough to slow motion kill an entire aquarium.
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Originally Posted by Delphinus
I want to drill a little into this. I can't remember if you mentioned this already, so if you did sorry for asking again, but ... apart from the readings, what are you doing for PO4 control? Are you using GFO, if so, how much, and how often are you changing it out?
The reason I ask is that I use the same Hanna tester for PO4. The tested results always show nominal values for PO4 in the end (the Hanna ULR tester reports in ppb of P, to convert to PO4 you have to divide the reading by 1000 and then multiply by 3.0666) but even so, I notice problems with SPS when I let my GFO get too old.
As far as PO4 goes, I am absolutely convinced of 2 things:
1) Most SPS problems we see and especially those that we can't easily rationalize away to something else .... are usually PO4 related.
2) Testing for PO4 is just something we do to make ourselves busy but the results are meaningless. You might as well dip your finger in the tank, taste it, then emphatically state the first random number that comes to your mind. (It's important that you state it emphatically, otherwise you have to do the test again.)
It might not be THAT bad but OTOH, I think it's closer to the truth than we'd care to admit. I think it's getting into the territory of inorganic phosphate versus organic phosphate and how our test kits and testers can only give you readings of one of those (I forget which), but the SPS are inhibited by the one we can't test (we just hope that if we test for one, that the other is going to be reasonably close).
I notice a definite correlation in how well my corals are doing if I change out my GFO every week, versus at slower change out intervals. Unfortunately the cost of GFO and especially at my tank size (280g) it is quite cost prohibitive to be changing it out every week, so this is something I tend to get an "opportunity" to observe repeatedly. If I get all gung-ho and change it out every week, my SPS grows well. If I don't then .. not only do they not grow well, many will recede or let go altogether. It can be as little as letting it go one or two extra weeks between changing out my GFO.
And yet, the Hanna tester will repeatedly tell me that PO4 is not a concern because it will be 0.02 or something so low that it's in the "it can't be PO4 that is the problem" category. But like I said, I'm convinced that it probably is to blame for a large majority of otherwise-unexplainable SPS problems seen in the hobby.
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I was previously changing my GFO every two weeks to 1 month, and had been doing it that was for nearly 2 years. A switch in brands to bulk high capacity GFO is on the list of changes that took place immediately prior to the damage taking place. Since this started I've changed the GFO once, and the next day three new colonies that hadn't been damaged before suddenly had huge chunks of flesh hanging off them in tatters. It's likely correlated and not causal, and I know other people who've used GFO from this same batch with no problems, but it's made me afraid to try changing it again.
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Originally Posted by Scythanith
Thank you! I couldn't find it for the life of me. Asylum, have you had a chance to read through this article yet? I know you said you were pretty busy but I figured it would maybe help to calm you down about the whole situation. Yes, it's heartbreaking but sometimes you just have to ride it out and look at it as an opportunity to re do your aqua-scaping.
Sorry I can't be more help.
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Yes I did read it. And the pictures and description look and sound exactly like what's happening in my tank, only he had way more time and resources to chase down possible leads. I've been getting 3 hours of sleep a night without even looking at my tank, so I've not been nearly as exhaustive in trouble shooting as I wish I could be.
Whether this has been the result of parameters swinging or getting out of whack in ways that I haven't been able to test or figure out, or a contaminant of some kind, the problem is either with something in the water, or something I'm adding to the water. Today I'm taking my GFO reactor, my biopellet reactor, and my dosing pump offline. I'm throwing out all the new additives that I've been using and going out and buying the more expensive brand name versions of everything. I'm going to do 50 gallon water changes every day until either this improves, or the majority of my corals are so far beyond any hope of saving that this will become a FOWLR tank until I can find new homes for the fish and organize the trades to turn the tank space in to a closet.
If this does improve, I'll add back elements one by one. Starting with a dosing pump dosing brand name "big three" chemicals, followed by brand name GFO, followed by biopellets. What sucks the most is knowing that with this amount of damage, my tank's recovery will be measured in years (if ever), and that's longer than I'm going to live in this house.
And thanks everyone for chiming in. 50% of my unresponsiveness is that I'm too busy to eat most days, and 50% because even thinking about my tank makes me feel sick to my stomach right now.