What mode of solar pool blanket works best?

We recently purchased an above ground pool and want to buy a solar blanket to go over it. (The kind near the bubbles, like bubble wrap)

When looking online, I have seen several option with differing descriptions:

The clear solar blanket is said to be "best" because it allows the sun to penetrate to the river to heat it. (As opposed to reflecting the light wager on up or soaking up the light and not heating the water)

The blue suggests that it is the "best" because it's dark color soaks up the sun's warmness.

The blue/aluminum combo suggest that the blue soaks up the heat and the aluminum reflects the heat stern into the pool, making it the "best".

Arg!! And to make the decision harder, there are different thicknesses as ably??

Can someone with experience with any of these please shed some light on this subject? The dumb things are so expensive. I want to receive the right thing the first time.

Oh, and I posted this Q in home & garden --> maintenance & repairs and with the sole purpose got one answer. I thought I would go straight to those who are most likely using the covers for their pools: Parents beside kids. :)

Help please?
Answers:    Well I don't have a pool, but my uncle & aunt do and they used to have one last summer that be blue that covered the whole pool, but this summer they have new ones that are circular and own a lot of them to cover the whole underground pool and they are also blue and heat up the pool really ably. That's all I have had experience beside though.

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