Green Hair Algea problem in my 3 Gallon!!!

Phosban from your LFS should come with a media bag. Just put the phosban in the bag, rinse it in some clean RO water and place it in the filtration area. You want the water to flow through if from the tank to the return pump area. Depending on how big or small that area is, you may have to get creative for placement.
 
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