I am not sure how accurate you API test kit is as I only use Elos and salifert. If you're near Jl you could go in to get a water test... If you even care about it.
But if you're happy with where your tank is then I wouldn't worry about it.
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Always looking for the next best coral...
90g starphire cube/400mhRadium20k/2 XHO/2x27w UV/2x39w T5/ 3 Trulumen led strips
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