Hello all. I'm finishing up on my ten gallon project, my first tank build, and I'm wondering what i should silicone to the Great Stuff that will be under water? Should I use sand, fine gravel, larger gravel, or even just use the coco fiber? I'd prefer not to have too much coloration in the water, I like it pretty clear. Any help would be appreciated. Oh, I also plan to have a few aquatic plants, havent settled on any particular type but I do have some pothos and spider grass here (i know spider grass isnt aquatic, it'll be in the land portion.) Thanks for any and all input everyone :happy: