My name is Kiki. My husband and I built our pond by digging out an old air raid helper and lining it with a liner last summer. Already wishing we had made it a bit bigger!!! It’s approx 2,000 liters 2m x3m stepped down and 60 cm at deepest. I have a 10,000 pressure pump running a water fall and a separate fountain that I plan to use to run a bog filter at some point! It is in full sun I do struggle with murky water as full sun but I have resolved the string algae problem this spring. Considering separate bigger up light current one is 9v and changed yesterday! Any ideas gratefully receive. As you can see until recently it was very clear.