Hey thanks for your thoughts. I assure you I do fully grasp that complexity. The previous poster's comments were really talking about bioload which is directly referring to nitrifying bacteria. I was responding to the previous poster's notion that the bioload of my dozen very small fish and corals was too much or that 5 fish was pushing it for his 125. To me comments like that are explicitly speaking to nitrifying bacteria populations keeping up with the nutrient load, not the overall diversity / balance of biome in a system. I do think my tank is largely complete fish-wise, but they are mostly small and all peaceful. 5 of the 12 is a school of green chromis, for example, 2 are peaceful timid firefish. I might add one or two small goby type fish but probably not much more. All of this is likely irrelevant to sudden tissue loss in certain corals.
I do politely challenge the notion that there are no circumstances where a new tank could have a diverse biome over the first few months. BRS has just wrapped up an experiment to gather empirical evidence around just that topic (link below). I was setting up my tank as that was going on and used some of the techniques that were showing the most diverse biome - Ocean direct sand, established live rock, and coral. You suggest that it doesn't matter that I moved 15lbs of well established rock, I think it matters very much. There is a point where it does make a difference as if you move everything from a fully established tank to another, you're going to still have a fully established tank in short order. I also think that testing methodologies are being developed and used (e.g. Aquabiomics) so I don't think it's fair to say biome maturity / diversity is unknowable, untestable as it is quickly becoming just that. To that end, I've ordered an Aquabiomics test to help put this debate to rest on my tank as well or prove everyone right that my tank has maturing to do. I realize this is a quickly evolving area of the science of our tanks, but I prefer to keep working to make things knowable vs continuing to suggest that all tanks are unable to support corals for, according to at least one post in this thread, up to a year.
I started my tank with some live rock, Ocean direct sand, and corals - all 3 of which scored in their top 4 for diverse biome after 1 month, those 3 tanks scoring in the 70-80+ percentile. I combined all 3 in my approach so I hypothesize that if my results follow, and my tank is 3 months further down the road, that I should have a solidly diverse biome. As I mentioned, I ordered my own test to see if that hypothesis pans out - stay tuned.
As I have stipulated previously in this thread, I totally understand that newer tanks suffer a myriad of challenges for a myriad of reasons. I've also demonstrated that I've avoided nearly all of those through experience, careful research, and daily attentiveness. Could there be an issue lacking in the biome that is causing this tissue necrosis in my corals, a lack of something that might offer protection, for example - sure. However, I tend to believe if that were the case, either problems would have appeared more widespread, or more gradual in nature vs just one day out of the blue a number of corals go south that were thriving. I've also been pointed to multiple instances of something nearly identical happening to well established tanks through this conversation.
Therefore, nothing is really pointing to "immature tank" as an obvious cause to me, it's a diagnosis of, at best - exclusion, at worst - convenience, that many people on this thread jumped to without exploring any other possibilities. That's where I have pushed back as it feels like punting on the real work, and quite frankly, many of the comments have been patronizing, and some people have acted like this is some justified punishment they're all too happy to let me endure for my sins of building this tank too fast.
Test Results are in and they will surprise. Thank you @aquabiomics
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