I’ve heard great things about Neptune CD pellets, and I’ve heard great things about Reef Nutrition TDO Chroma Boost pellets. Based on the description of the Neptune CD pellets, they seem like they are either exactly the TDO-EP1 pellets repackaged for the Neptune AFS, or possibly the TDO-EP1 pellets coated with additional coral food. I use my Neptune AFS mostly when I am out of town. So far I’ve used a mix of other brand pellets (veggie and non-veggie), crushed flakes, coated with coral food, both in the AFS and daily feeding. I’d rather have a simpler option, especially when I’m using the AFS. Anyone have any insight about the difference between the two, or if there is any?