[ecomodded]

I looked into the Dura-Skrim Liner and watched a video on it , they were using the white for the grow beds.
Which i thought was a bad idea.

Plants roots do not like sunlight ,so black would be better for the plant tanks and the white would work better for the open fish tanks to help keep the water cooler.

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edit to add : White might cause excessive algae which may not mix with the fish that well.
Probably black is commonly used for that reason.