concentrate is an amazing thing. you can buy a frozen small tube of orange concentrate and make a ton of oj just by adding water.
its all in the formulation of the product. when they formulate it, water is always added. remove the water, or crystalize it like a betaine, and now you have a viscous product with less water. less water = more efficient.
that is why they made these. these are to be used in front loaded washers, which use much much much less water than the top loaders.
think of it this way....
you put a 1/3 cup of salt into 1 gallon of rodi. mix it, and pour it into a 40 gal tank. what happens?
take that same 1/3 cup of salt, mix it into a 1/2 gal of rodi, and then put it into a 14 gal tank. now what happens?