I bought a quite large and heavy resin pot, that looks like a log bridge, for my new anubias... it was going to be so perfect... sprinkle a few ceramic media on a few of the roots, and perfection... must be many air pockets, inside, because it floats like a boat, even if held under water until all the air escapes, even if filled with ceramic media... now I'm drying it out, so I can silicone a big limestone slab under it to hold it down ( I could use slate, but this is a harder water tank, so the limestone will work) ...