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| View Poll Results: What is your PO4 testing routine, and what do you do to control PO4? | |||
| I run GFO. |
   
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26 | 46.43% |
| I run a ULNS system. (Eg. Zeovit, Ultralith, Vodka or other carbon dosing) |
  
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13 | 23.21% |
| I use macroalgae (chaeto, caulerpa, etc.) |
  
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31 | 55.36% |
| I don't do anything. Water changes good enough for me! |
  
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8 | 14.29% |
| I test PO4 regularly. |
  
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8 | 14.29% |
| I test PO4 infrequently. |
  
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15 | 26.79% |
| I have noticed nonzero PO4 in the past. |
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3 | 5.36% |
| I have never had a PO4 reading. |
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8 | 14.29% |
| Multiple Choice Poll. Voters: 56. You may not vote on this poll | |||
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#26
11-06-2009, 02:05 AM
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I used a D-D kit and a colorimeter and voted that option.
 In your opinion what is the difference between "undetectable" and "not present at this level" ? To me "undetectable" simply means "present in levels below the threshold for the reading category". In the case of D-D/Merck, the lowest value is 0 to 0.008 (which is VERY low IMO - as in, less than 0.01 - no other test kit, including the colorimeters can read to that low of resolution). One thing about the D-D/Merck though is that it is not a linear scale.
__________________
-- Tony My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee! 
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