I offer floating flowers.

I offer floating plants:

phyllanthus fluitans - 1 handful - 60 CZK (when it gets a lot of light, it turns beautifully red; with less light, it is a deep green)
salvinia natans - 1 handful - 40 CZK
limnobium laevigatum - 5 pieces - 40 CZK

The roots of floating plants can serve as a habitat for shrimp or can be used for spawning by some fish species; fry can hide in them, and they provide the first live food.
All species can also be kept outdoors in ponds and ornamental tanks.
They also function as excellent biological filters, removing nutrients from the water because they grow quickly.
They serve as great food for herbivorous fish, such as herbivorous piranhas, uarus, and grass carps.

Everything is personally grown.