I am still testing this on my garden, but I do feel it is important to pass along that it might be best to simply use measuring spoons to make your mixture. I think my plants are responding well to this product, but just as the old adage conveys, "A little goes a long way". In all seriousness, follow the directions. Whatever volume of a blend you are trying to create, follow the path set out by the company, it is a very concentrated liquid that they send in this bottle.(Update from Aug 3, 2013: I DID burn my leaves because I DID NOT follow the directions as listed on the bottle. So just use whatever the prescription is from the manufacturer. The plants seemingly love this stuff now that I have corrected my amounts in dilution. I am still in the process of developing my eye for comparing plants that are on this product against those that are not on this product. Updated reviews to come in the future....stay tuned.)I have a Zep spray bottle that I use to spray my garden down. This liquid Kelp product is a very dark liquid and can easily stain clothes, fyi. All in all, I think I am going to have great and positive data in a few months. Just go easy with your mixture. If the measurement called for is a mere teaspoon, trust it. I made my first mixture by eye-balling how much I poured in the empty spray bottle. That was a mistake; my leaves wilted. It wasn't a broad and ubiquitous kill-off. But, I did pour out half of my 'too strong' mixture (preserved it in another container for a 2nd mixture) and diluted what remained with my distilled water. I am closer now to where I need to be with my mixture.If you are on the fence about buying this product, I would say consider going with buying a Quart because it is going to last you a very long time. I bought a gallon and I think at my current rate of usage, I'll have this product for well over a year in its concentrated form. A quart probably would've been the better way to go, but I know now despite it being after the fact.I think it is a wise investment, though. Looking forward to seeing fantastic results.