How to clean & maintain your goldfish pond Using by the pond vaccuum ...
As far as on going maintenance , algae stuck in your pond liner in your pond will help you manage nitrates. Any trash or leaf matter that lands on your ponds surfaced should be skimmed with a net to help with keeping it clean and I highly suggest you buy a pond net to protect your goldfish from predators. Best of luck.
3 Basic Maintenance Tasks for Your Pond Regular maintenance for an Ecosystem Pond with koi, goldfish or any other kind of fish includes emptying the skimmer about once a week, adding a regular dose of beneficial bacteria and, of course, feeding the fish.

Pond skimmers provide effective mechanical filtration by removing large debris from the surface of your koi pond or water garden, preventing it from impacting your pond's ecosystem. Pond Pro offers top industry brands like Atlantic, Aquascape, Big Bahama, and more to keep your pond clean and healthy
The Importance of Regular Pond Skimmer Maintenance

Keep your pond water clean and healthy! Learn the importance of regular pond skimmer maintenance with a step-by-step guide for efficiency and repair tips.
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