Already many diving videos with GoPro's and also the Actionpro I made, filmed with Torche - all not bad but not perfect. Now for the first time used a filter and the result is simply top. am thrilled!!!
The filter is easily attached and is easy to peel back. Be careful not to filter only under water to put otherwise the air between the camera lens and filters can not escape and you as the water level in the filter is filming;)