Yup. All of my glass tanks have this issue. Yet, it has not been an issue. It seems they only get where the silicone is very thin. In reality, that silicone line could be less than what they are in the tanks and it would be just fine. The biggest thing with the silicone is what hold the panes together. Snails will never be able to get to that, or at least in my tanks (some 20 years old) they cannot and it is only the very edge where it is very thin.Has anyone noticed missing pieces of silicone where snails have been eating algae? I saw this recently and wondered if it could become an issue. Currently, there are just small bits missing where snails graze routinely. Going to be watching this closely to be sure it does not exacerbate. I do not use a scraper near the silicone, so I know it isn't me.
Other than slow/steady hands and keeping the blade parallel to the seam, no. I also just accept that some coralline will stay in the seam corner, and only go as far as to remove any that is visible from the front of that pane.
People may have different experiences than me (or use these much more frequently), but for me the only thing that really works for true coralline growth is fresh 4" razor blade scrapers.
In my acrylic tank, I use credit cards, hotel room keys, etc. They have to be fresh, once used a couple of times, out they go. Unfortunately, in the acrylic tank, the only place coralline grows is on the darn acrylic!
