You know, I'm sure it bothers them a little when they can see me, but I don't think that it bothers them that much if there isn't something threatening within view. They don't even seem that bothered by me. The more I think of it though, I might use coca fiber with future frogs just because it does feel a little easier and it is probably a bit more comfortable. I imagine when I have a larger amount of frogs I'll go full foam though.

Another plus about this foam, I think it brings out their colors. When they go into the coco fiber they tend to dull themselves to fit in. They both have their negatives and positive, but I don't think the filter is that much worse in comfort for it not to be an option, especially with a lot of frogs. You'll see a lot of videos with people keeping their frogs on foam on youtube and other members here use it as well.