No they're not all created equal. In my opinion, Hagen test kits are pretty poor quality. Salifert or Aquarium Pharmeceuticals make some pretty good kits, they're a bit pricey in some cases but well worth it.
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Christy's Reef Blog
My 180 Build
Every electronic component is shipped with smoke stored deep inside.... only a real genius can find a way to set it free.
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