another: does dow corning make a reef safe sealant? as a facade consultant i've become a huge fan of dc's silicone products (795 holds the whole dang world together), i'm also from midland michigan, so i like to support the home team
When I started building my GARF-style plywood tank, I bought a bunch of the Dow Corning ("DAP") clear silicone caulk for the job. But then I contacted Dow and was told all their products have the fungicide. Had to return all the DAP stuff..
My memory escapes me at the moment but I'm pretty sure that only the Kitchen and Bath? has a fungicide. If you look at the whole list of products the ones (GE) with a fungicide should be cleary marked. That being said I would stick with Type 1 ...