It depends on the concentration of the water that is collected as to the dilution ratio. Some companies collect it, then evaporate it down by about a third. Then it is about 1 part ocean water concentrate to 50 parts of ro or distilled water (based on a dilution water source of 50 ppm TDS). For exact reuslts one should probably use a TDS meter to hone in on the target concentration of 2000 ppm TDS. Such a meter is about 40 bucks. The effort is worth it here.
Disease is prevelant due to mineral depletion on this planet. Even Linus Pauling made this observation. This is one of the best, easiest, and cheapest methods to counter this problem and get super nutrition back into your body. You can also use the same ocean water for sprouting.
Good luck. Here is one such company that sells concentrated ocean water.