I made a simple light shade today to help reduce algae growth at the screens slot. My spray bar is made from 25mm pipe so I used 40mm ABS pipe cut to length then cut a 6mm slot along it's full length (i used a plunge saw for this) I then replaced the medium sized tie wraps with smaller ones and used the nodule ends where the end of the tie wraps feed into as spacers to make sure one side of the light shield dose not touch the screen. The first 10mm of the screen is now shaded by the light shade. Simple cheap and quite easy to do.
