I fly fish every weekend, and I use meerschaum granules for a similar reason. I don’t use filters or get tongue bite when I’m enjoying my pipe on my patio or walking around the neighborhood. I typically fish shallow, clear water, and most of my time is spent slowly walking and searching for fish. The granules definitely seem to prevent me from scorching my tongue when I see a fish and fire off a quick cast, as my attention tends to wander during those short bursts of activity and I’ve scorched my tongue something fierce a couple of times. The granules seem to provide enough of a buffer that I’ll likely keep using them while fishing. If you can’t solve the tongue bite issue and this method keeps you smoking, it’s probably worth a shot