Great look, for improvement technique

The fountain stands with me in the garden and looks really good!
It consists of a heavier lower part, which also contains the (very small) pump and a lighter (about 8 Kg) upper part. Both parts are loosely connected by an approx 7cm thick plastic pins rotate (and tiltable).
My concern is that when a heavy storm of shell could fly away.
Has a tiny filter that is added after a few hours (pollen, flowers) - The small pump (powerful jet of water with enough strong pump power). The water jet is then much weaker and the filter needs to be cleaned often. The pumping chamber is quite small and can pump larger filter barely.
I have also provided a mini chlorine tablet in a glass container in the pump chamber to prevent algae from growing in well water.
In a closed room / conservatory of fountains will be better off.