Originally Posted by RussellB
Install a UV filter and Water lillies. UV filters are fairly cheap and will keep the water clear. The lillie will keep the algea down. My pond is in full sun all day and is very healthy with almost zero maintenance. I don't even test my water and the Koi are very healthy and growing.
UV clarifiers are a waste of money when proper natural balances between plant and animal is maintained.
How do you know if your pond is healthy if you never test it? Clear water doesn't mean healthy water any more than Green Water means unhealthy water. Water quality imbalances do not always produce immediate change in fish behavior, some damage is cumulative and will evidence itself only when it is too late for a remedy.