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So here's a 24 hour update.
It feels like I've been lucky so far. No short-term reaction whatsoever from my corals, fish or invertebrates.
As correctly stated above, my po4 level has come down. It currently reads 0.72. Still a huge number, but I'm happy to see it's now readable at all.
I'll do another test tomorrow. Meanwhile, I'm thinking of ways I could slowly lower my po4, assuming slowly would be better in my case. Did some reading, but open to suggestions.
I'm running this nano on a canister filter and without a skimmer, so I'm a bit careful with ideas like using lanthanum chloride. Also have my doubts of using GFO in a canister filter. Another idea is using Seachem Phosguard, but don't know if this will be sufficient enough.
Also, at what rate would be best to lower my po4 levels daily or even weekly?
Along nose lines. I would think that it would continue to be sequestered and drop over some period of time. Being a small system it should be easy to knock down…. Unlike some of us who run or ran masssive amounts of rock and sand and over fed for years before we realized we had a problem!Once the number stabilizes, there will be no difference in if you took years and years of overfeeding to get to this level. There will still be a massive amount of po4 bound into the rocks. My guess is that the number might go down some, but the bulk of what is going to bound has already done so.
If you want to lower it, then GFO is probably your best bet.
Along nose lines. I would think that it would continue to be sequestered and drop over some period of time. Being a small system it should be easy to knock down…. Unlike some of us who run or ran masssive amounts of rock and sand and over fed for years before we realized we had a problem!