fertilizers in aquaponics?

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Vented seedling pots are placed into holes in the floating foam rafts.

Photo: BOJUN CHISWELL

Question by : fertilizers in aquaponics?
An aquaponic system utilizes nitrogen from fish waste to feed plants. When looking at a normal fertilizer for plant growth there are 3 chemicals that are typically listed; nitrogen, phosphorous, and potassium.

Is there any way to raise the phosphorous and potassium in the system without harming the fish?

Can you add blood/bone meal (or anything else) to the grow bed, or will it result in a poisonous environment for the fish?

What do you think? Answer below!