You can download the 150's instruction sheet from the 150 product listing on Marine Depot's site.
If properly set up for bio pellets, it will have 2 white plastic screens inside - those need to come out for GFO use. You will replace those with 2 circular sponges. I'd you don't have them they can be purchased for a few dollars.
You need a small low flow pump with an flow rate recommended in the instruction sheet, like a Marineland 404 or 606. You should use the little ball valve to control flow. Other than that all you need is soft tubing & you're in business.