Over the past few years 7 plate water ionizers have become the dominant style. Now more 5 plate water ionizers and a few 9 plate water ionizers have appeared on the market. The 5 plates being less expensive and the 9 plate being the most expensive of all.
But is the difference in price means a difference in results?
When it comes to money more is better right? When it comes to
problems less is better. But when it comes to the number of ionizer
plates there is a good reason why 7 plates have become the standard for
Efficiency - I adored the twelve cylinder motor in a Jaguar I drove many years ago. If you have the money why not? Yet it required 3 times the maintenance, cost more to purchase, and there were fewer moments (or roads) where I could really open it up. 7 turns out to be a good number for several reasons: production cost, counter size, and if well made will get you where your going in ORP and pH.
Surface Area - It's not a matter of "more is better" because 1 huge plate could easily have the safe surface area as 21 small plates, but where would you put it? Besides which the production costs would change.
Safe ORP and pH levels -
You don't want too much alkaline either. Too extreme an alkaline level
can be harmful rather than helpful. Extremes in ORP and pH (like a 12
cylinder car) are unecessary.
The difference in prices between a 7 and a 9 plate machine is often $1,000 more. And certainly more profitable for the water ionizer company than beneficial for teh consumer.
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Conclusion - A 7 plate water ionizer, if done right, carries the most economical number of plates for maximum results in the desired range of pH and ORP. 9 plate water ionizers increase cost and while they can bring a greater ORP and pH range it is most often outside of the range you will use.