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Discussion Starter · #1 ·
Hello friends, when is the best time to test aquarium water?
For po4, no3, iron
Suggest a few hours after fertilization or the day after fertilization.
The result is different in each.
 

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Test before you fertilize, immediately after, and again each day for a few days. Record the numbers. This will give you a good idea of how much nutrient uptake your plants are getting and bacteria is converting (depending on what you test for).
 
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