Any fertilizer can burn if used at a strong enough concentration. MC seaweed can be used at about 1/4 strength to soak seeds and then to water the seedlings during their "water only" phase. Since there's no reason to mix up a gallon or even a quart of it just to germinate seeds, we'll just mix a cup of it by eye, using the color and transparency as a guide. After using it at 1/4 strength for seeds, 1/2 strength for foliar sprays and full strength, you quickly get an idea of what the solution looks like at each concentration.