I had a 16 oz water bottle that I put some holed, added the K1, a rigid airline and attached it to a return on one of my nursery tubs. Cost me less than $4.00 for everything and took a couple of minutes to assemble. And yes it is working great.

Depending on your stocking density, it does not take a large bottle or very much K1 media. If have rock in your sump you could use a tupperware container placed on top of the rock or even place one in a bucket next to your sump. Some people have the flow entering from the bottom and others from the top. If you have a bleed of valve on your pump you could use the flow from that. This media is not very picky, as long as it is kept in motion it works.