lance said:
Wouldn't the recipe be the other way around?
It seems to me that a 32 oz. rate at 2.5 gph is 4 times stronger than a 16 oz. rate at 5 gph.
One jug is twice as strong and being mixed with half as much water and the other jug that is half as strong and being mixed with twice as much water.
Nope. Consider the two scenarios:
1. Mix 32oz in 5 gallons. Meter at 2.5 gallons per hour. Trigger the wand for an hour. You have sucked 2.5 gallons (half) of the 5 gallons of solution out of the jug, and thus half of the 32oz (or 16oz) of concentrate.
2. Mix 16oz in 5 gallons. Meter at 5 gallons per hour. Trigger the wand for an hour. You have sucked 5 gallons of solution out of the jug, and thus all of the 16oz of concentrate.
So, both scenarios are using the same dilution, that is 16oz of concentrate per hour of wanding. The only difference is with scenario 2 you empty the jug faster, and thus have to refill it more often.