Ponds in direct sun all day are the hardest to manage.
These plants are called “aquatic marginals,” and many of them are perennials that will come back each year.
To prevent “hot spots”, water should circulate completely from one end of the pond to the other, twice each hour.
Rocks and pebbles equalize the night and day temperatures, cooling the water by day and warming it at night.
A healthy living pond environment provides enough food for goldfish and snails, who help keep the pond clean.
Every water feature has “issues” with string algae, particularly during the summer months.