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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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#1
11-30-2009, 07:03 PM
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Do you test to determine when your GFO needs changing?
GFO: Phosphate remover, Granular Ferric Oxide.
For those who test, how often do you find it needs to be changed in your tank? For those who don't test, what makes you decide when to change your GFO. For those who don't use it... why not? 
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