NO3 and P4 in fish food

I found this in an article which basically said that nitrates an phosphates are actually in the animals than the products used to make frozen or freeze dried food.

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maybe that saying when it breaks down it gives out that amount of NO3 and P4.

 

+1 to this. The binders and other additives can have a dramatic effect on the amounts of phosphates and nitrates in a given amount of food.

 

I got the info out of REEF Hobbyist Mag third quarter 2010 volume 4. Other great articles there also.

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Flake and pellet foods contain the most amount of nitrates and phosphates. When using frozen foods it is best to drain the food to remove the water/liquid the food is frozen in before adding to your water. This will help to reduce the amount of nitrates and phosphates entering your water.