My NO3 is zero, i dont supplement but was considering it to raise the alk.
The test kits are aquarium pharmaveuticals, there not much else out there here unless i order online or buy hagen. Water changes is how i keep the calcium up. I think the test kits are correct i dont see to much growth from my SPS latly so i figure the alk was low so low and behold it was.
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Sean
Back in the good ole days 
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