Amazon.com : GoScope (60M) Red Filter - Compatible with GOPRO HERO4 / HERO3+ / HERO3 Dive HOUSING (60M Case Only) Laser Cut Optical Red Filter (See Pictures to Make Sure This FITS
4-Pack Diving Filter Kit for GoPro Hero 3 - Directly Attach on GoPro Lens - Enhance Color for Underwater Video and Photography for Diving, Snorkeling, and Scuba Diving - Walmart.com
FLIP11 One Filter Kit with DIVE Filter for GoPro HERO 5, 6, 7, 8, 9, 10, 11
Shoot Waterproof Case Lens Filters For Gopro Hero 4 3+/4 Black Silver Action Camera Red Filter For Go Pro Cam Diving Accessory - Sports & Action Video Cameras Accessories - AliExpress