Once a year, and I think spring is a good time, I recommend a total cleaning of your garden pond. This means removing all plants, all water, all fish and giving the pond a good cleaning. This will rid the pond of any toxins that have built up over the winter. These toxins can build quickly if the pond ices over. Leaves can fall in the pond in the fall and winter and start to decompose when the weather begins to warm. If there is debris in the pond, now is a good time to get outside and prepare to get dirty. If you live where the weather is warmer and some trees do not shed their leaves until spring, wait until after the leaves are gone or you will be scooping dead leaves out of your clean pond. If you do live in warmer climes where your water does not freeze, a partial water change might be all you need.
Cleaning your pond is much easier with two people. See if you can find a helper, even if you have to bribe one. Both of you should wear very old clothes that you will use again only to clean your pond. Pond cleaning is not for the faint of heart. Pond scum is as awful as it sounds.
Tools you need:
Steps in order:
Whew, that's done for another year.
You can also probably find someone in your area who cleans ponds. I used to clean about 200 ponds a year and charged from $245.00 up. That should help you choose someone.
Mosquito fish are a great natural solution to the problem of landscape pond insects, but you'll need to take some steps to keep your fish healthy.
Pond leaks are not fun. Noticing a water level drop, you are sure you face repairing your pond liner. Before you panic, make absolutely sure it is a leaking liner and not another problem.