I don't know, you may tell.. But till now it holds on and still has room for more. no idea where it ends. It's in an old drinking fountain for the cats, but since they rather drink from the aquarium i gave it an other use. Some rotala's in there Indica and marcandra, HC, 2 kinds parrot feather red and green stem, differnet mosses, salvinia, duckweed. Still got some in the propagator to add later.