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| View Poll Results: Best Calcium/Mg/Alk/Nitrate test kits? | |||
| Instant Ocean |
   
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0 | 0% |
| Salifert |
  
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10 | 62.50% |
| ELOS |
  
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1 | 6.25% |
| API |
  
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3 | 18.75% |
| Tetra |
  
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0 | 0% |
| Seachem |
  
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2 | 12.50% |
| Hagen |
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0 | 0% |
| Voters: 16. You may not vote on this poll | |||
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#4
01-27-2010, 10:09 PM
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When was the last time you calibrated your pH probe? After 3 months I find mine can easily be out by .2 When they're out by even more than that I replace them which is probably between 1-2 years. I buy standard probes and not Lab grade and that also shortens their usable lifespan.
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