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oil pan 4 · 12-06-17, 02:51 PM

If there is any plastic in between the light and water it will block around 99% of the UV.
Then sun light allows other stuff to grow.

12-06-17, 02:51 PM	#2
oil pan 4 Land owner Join Date: Nov 2012 Location: NM Posts: 1,026 Thanks: 12 Thanked 127 Times in 107 Posts	If there is any plastic in between the light and water it will block around 99% of the UV. Then sun light allows other stuff to grow.