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Hey Sergi, you are in a bit of an odd pinch. Usually doing the amount of carbon dosing you are doing lowers nitrates but phosphates stay stubbornly high.
You have the reverse problem.. You have almost no p but n is a problem.
I think you are in a good starting position.
Which test kits do you use?
Is it possible that you actually have no po4 at all in the system?
That could explain struggling corals, no algae, and hard to control nitrates....
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Matt.
Current Tank Info: 53x32.5x26 190g dt 60g of sumps 3 tank-100 gal frag system 6xAI prime 8xt5. 4x maxspect gyre. Skimz Dual internal sicce pump skimmer Deltec PF601s ca rx+Kalk stirrer
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