THIS THREAD APPLIES TO ALL MODELS OF TURBO ALGAE SCRUBBERS If your screen is very mature, you may be able to get algae to grow faster and thicker by removing the diffusers. This increases the intensity of the light, so I would closely monitor growth. I recommend removing one diffuser, and monitor the results. If you are running a Rev 1 L2, you will probably have to modify the LEDs as described in the L2 LED Array Upgrade & Modification (L2 Rev 1) thread as the full-strength blue LED might be too powerful without the diffuser. You may be able to remove the diffuser without doing this modification as long as you place something on the clear window in front of the blue LED to knock down the intensity of that LED - something similar to the black electrical tape recommended in the Diffusers thread.