I'm taking the second one. The first bought a round for feeding fish and this one bought to disperse the upper grass. Size gdeto 10 by 10 cm The suction cup is excellent, adjustable. The round feeder is smaller.
Só fast, 8 says to England
Very convenient thing, I'm happy. On the surface exactly floats, without distortions. What you need.
In fact, it was possible and in a pet store to buy even cheaper