Backyard Aquaponics
A place to discuss aquaponics

Although pyrethrins are quickly metabolized by birds and most mammals, fish and aquatic invertebrates lack the ability to metabolize these compounds, leading to a toxic accumulation of byproducts.[25] To combat the accumulation of pyrethroids in bodies of water, the Environmental Protection Agency (EPA) has introduced two labeling initiatives. The Environmental Hazard and General Labeling for Pyrethroid and Synergized Pyrethrins Non-Agricultural Outdoor Products was revised in 2013 to reduce runoff into bodies of water after use in residential, commercial, institutional, and industrial areas.[32] The Pyrethroid Spray Drift Initiative updated language for labeling all pyrethroid products to be used on agricultural crops.[32] Because of its high toxicity to fish and aquatic invertebrates even at low doses, the EPA recommends alternatives such as pesticide-free methods or alternative chemicals that are less harmful to the surrounding aquatic environment.[33]

I got rid of most of the aphids on the cabbages with the Neem Oil but found that when used on the Broccoli it caused the leaves to shrivel and die as though they got sun burnt. I need to do follow up mini sprays to get the ones that where hiding or arrived later.