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| View Poll Results: Do you test to determine when your GFO needs changing? | |||
| Yes |
   
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6 | 7.89% |
| No, I change it on a schedule |
  
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22 | 28.95% |
| No, I change it when my tank looks like it needs changing |
  
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20 | 26.32% |
| I don’t use GFO |
  
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28 | 36.84% |
| Voters: 76. You may not vote on this poll | |||
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#2
11-30-2009, 07:09 PM
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Despite owning a milwaukee digital phosphate meter which imo gives you a much more accurate reading then a test kit, I change my media every 2 weeks semi religiously. I used to be bang on, but have let up over the last few months. Sometimes letting it go an extra week or 2.
I choose 2 weeks because the media should still be working then. I can change carbon at the same time, and with bulk pricing it is affordable to just change it then instead of worrying if it's still good or not. 
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