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Question: Will this fit my gopro hero 3+ lcd touch bacpac limited edition housing?
Document: I found one works just fine in bottom of housing, and it is super easy to get it in and out - my suggestion would be to start hereand possibly cut a half insert more for bottom if needed. Did not use filters, but after seeing other products - red filter - for underwater filming, that fit right over housing window, think that is better way to go - just make sure they fit Hero 3+ housing as it is smaller than Hero 3. Price for everything was good I thought.
Used the antifog inserts in Hero 3+ Silver edition housing during several snorkeling sesssions during a Dominican republic trip. Worked awesome - absolutely no fogging whatsoever in housing. Vendor says to use two in housing - one on side and one on bottom, but I found it extremely hard to get one on side and it kept getting crushed while trying to insert it or camera.
We went diving in the Caymans. We had two GoPro cameras, Hero HD and Hero 3. We used the red filter while scuba diving. The filters cannot be taken on and off once the camera case is close, so the video above water has a red tinge. But what a difference the filters make for video below water. We compared the Hero 3 and red filter with the Hero HD and the colors were so much better with the filter.
For the money, these filters can be ok. They do not actually fit well inside the waterproof housing without some trimming. The filters themselves are fairly flimsy, so, they're easy to cut. It can be made to work, if you take the time.
I used the red filter diving in the Cayman Islands and it did the job. Yes, you are paying for a small piece of flimsy plastic but unless you can make it yourself, you still need a filter. At the end of the day, it's still cheaper than external snap-on cover style filters or flip style filters which some have complained trap air bubbles during diving. This one is inside the GoPro housing so no concerns about bubbles being caught in the camera view.
There was some concern that the filters would not work as described. Used the filter in Cozumel, Mexico  in water depths from 35 feet to 85 feet. I haven't had time to edit all of the recordings, but quality is very acceptable. Would recommend this for the GoPro 3+
These filters do not fit correctly into the go pro. Do not waste your money. Bought it for the magenta filter. Does not work as shown.
You need to delicately position it exactly over the camera then place the camera into the housing. If it shifts when you put the camera in the housing, then you need to try again until it sits perfectly center over the camera and the two wings bend over the sides of the camera. As so, installation and removal is not quick or easy.
Works as advertised, but seems pricey for 3 pieces of thin plastic and pieces of absorbent paper.
I suggest, once you fold the tabs, leave it. (The broken tab is the only reason i gave it a 3. )I've used the magenta once for crawfishing. It definitely made a difference when you put your cam in the water. i also used the antifog, but not sure if it really made a difference as the case does a pretty good job sealing it already.
Answer: Yes, but the fog pads are a tight fit but they do work.