Both photos were taken moments apart. The polarizing filter blocks the reflection to deepen the colors, but without the filter, the ripples in the water emphasize the action more.
I suppose using the filter or not depends on what you, as the creator of the photograph, are trying to convey in the image.

Without! :o) ????? · 2011-01-23: 16:15

I like the first , I F the filter blocks the reflection I take it is the first with the polarizer.? sorry i'mm feeling rather tired MoMac · 2011-01-23: 16:16

Was it a warming polarizer? I like the colors better in #2 But in #1 with the polarizer I like that we can see the rocks better under the water! HoosierAtHeART · 2011-01-23: 16:26

Great set. joycephotography · 2011-01-23: 16:28

I actually like it without mystic1 · 2011-01-23: 16:55

Without :-) jet28 · 2011-01-23: 17:11

Like #2. SunFlower1990 · 2011-01-23: 19:40

Wow, what a remarkable difference! And a great exercise for us to contrast! You gotta get me one of those!! djnana · 2011-01-23: 19:44

Larry, I agree with your thoughts. However, I sort of like the almost "illusion" of the bubbles suspended on air in that the water surface is absent! Cool effect & nice color also. danrav · 2011-01-23: 20:08

Great demonstration. I use my filter a lot in the summer. Sometimes incorrectly! RayNvb · 2011-01-23: 23:02

I prefer #1 !! No matter which photography type we opt for, I think the polarizer will become indispensable... Yokai · 2011-01-24: 00:23

without for me too. jennye · 2011-01-24: 03:23

I like the colours of the first and the reflections of the second. Is it possible to combine? hannamagnusson · 2011-01-24: 04:27

wow, it sure changed the tones though- I like it with the filter urmysunshine · 2011-01-24: 11:23

Good job! photogp · 2011-01-24: 11:27

difficult to decide for this photo slowpete · 2011-01-25: 01:40

Like nr 1! wildduck · 2011-01-26: 13:21

So beautiful! :) Kozuka · 2011-01-26: 22:56

Nice lesson on the polarizing filter...and perfect illustrations with the shots! lookagain · 2011-01-27: 19:08

I like the image better without the filter. The polarizing filter give better results in brighter places. It's nice to see both shots for a comparison. ArtBee · 2011-01-29: 16:11

How special. I agree with you that the image that you are searching for creating would be the determination of filters... karmankwarner · 2011-01-31: 11:47