Well, this touches on a strange issue. Ferts have different NPK ratios. I've read that the reason for this is so people can tailor the fert to specific conditions. But my logic is also good, in my opinion. Using an even NPK fert can be and is just as good as anything else. My argument is this, a manufacturer wouldn't make a fert unless it works. An even fert is just as good as an uneven one. I believe that even NPK ratio ferts are better because they can be left alone for the life of the plant. I suspect that plants take up what they need when they need it. It is possible to overfert or underfert, however, the possibility is reduced in my opinion when an even fert is left alone. This has been my position on this issue all along - a grower really doesn't need to be too involved in the process, unless there's an obvious problem. Your words regarding the tires makes no sense. Do you honestly think there's as dramatic of a difference between ferts as there would be between bike and tractor tires? That doesn't make sense. You can use an uneven fert if you want; go ahead. But be prepared to spend more money and get involved in the grow more and also be prepared for more problems. Why do this when it can be easier. I wonder if there's anyone on this board that might be interested in giving my advice a test, just to see if they can prove me wrong. All it would take is one plant. Follow the recipe I gave earlier and see what happens. It works for me and it can work for other people too, without alot of expense and hassle. Try it, you might like it.