EelVision Red Filter (BG) for GoPro HERO4 HERO3/3+ - Dive Filter / Scuba Diving Underwater Color Correction Underwater color correction filter to reduce blue and green tints and restore vibrant colors while diving. Ideal for blue and blue-green water (BG) from 20 to 60 feet (6 to 18 meters). See also our green water filter (GW) and our BG+GW bundle! It can be installed and removed easily from inside the GoPro housing. Does not require to remove screws and does not void GoPro's warranty! Compatible with GoPro HERO4 and HERO3/3+ only.