Let me try this one last time... and I will be more emphatic before I bow out. You will not be able to be in charge of this and have it work out. If you must control the nutrients on your own, then you will fail and somebody will be getting a good deal soon on all of your really nice stuff.
Stop everything that you are doing but water changes and feeding your fish. The N and P need to rise to later fall. You will need to have cyano, diatoms and the ugly phases to get past them. Bringing anything online to keep them low will just keep you on the same path that you are on now where you are not going to be able to do what nature has learned to do so well.
Just let go for two or three months. Then, test some water and see where you are at.
Adding extra real live rock to the sump is a good idea, BTW.
You can also set your skimmer a little on the dry side
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The phosphates are likely binding to the aragonite. Lots of people get fooled here and think that they don't have any - you have some. Keep on with your water changes to export them. If you stay on the water changes, then the aragonite will never stay full - your water change will lower them (a bit) and the aragonite will release them back to equilibrium.
Eventually, the aragonite will fill up. This is no bueno, as you can imagine. Doing water changes regularly and early is key to long-term success.
I am glad to hear that stuff is looking better.
I think you are thinking about this wrong. You dont remove filtration because you have too much. There really is no such thing. You just ADD FOOD. More food equals more growth. The more/better filtration you have, the more you can feed while keeping Po4/No3 in check. Just feed more....its pretty simple man. You are overthinking this.
There is such a thing as too much filtration, Zeovit is very good at stripping the water of all nutrients. Then you have to feed a sh*t ton of food just to get some nutrients back into the tank.
I love your tank malx. I was a former zeo user.