The cleaning of the pond should only be removing the mulm from the
bottom. The plants need some Muriate of potash used in gardens to
promote flower and fruit growth. Or sulfate of potash, both of which
get dissolved in water before adding a spoonful or two to the pond. The
plants will perk up if added each week. There are solar operated pumps
or use an extention cord to run the pump. Then you can add a biofilter
to keep the water clean . Good luck!