Seachem;500741 wrote: Interesting that you ask that. I just recently spoke with a store owner who has all of his customers running strict low nutrient systems using various methods. He actually has all of them using fuel for supplementation in conjunction with this and was raving about how well it works in this type of setup. I have also spoken directly with customers who are using it in their low-nutrient systems as well. While I have not experimented with the VSV method myself, I do not think there would be any issue with using fuel in conjunction.