Every year around the middle of November, we get the same phone call. A homeowner looks out at the pond, sees a brown mat of soggy leaves sitting on the bottom, and asks how fast we can come get them out.
We can come get them out. But here is the honest answer nobody loves hearing: the work was never the hard part. The timing was. Netting a pond takes an afternoon. Undoing a season of leaves that already sank takes a full cleanout, and your fish spend the winter paying for it.
What leaves actually do down there
A leaf that lands on the surface and gets skimmed out is a non-event. A leaf that sinks is a different story. It breaks down slowly on the bottom of your pond all winter, and as it does it releases nutrients into water that has nowhere to go.
Two things come out of that. The first shows up in April, when all those stored nutrients wake up with the water temperature and feed the worst algae bloom you have had in years. Homeowners blame the spring. It was the fall.
The second is more serious. When a layer of ice caps the pond, that decomposing leaf litter keeps consuming oxygen and releasing gases underneath it with no way to vent. That is the real danger to koi in a Pennsylvania winter, and it is almost entirely avoidable. A pond that went into winter clean gives your fish a much easier five months.
The window is narrower than people think
Here is the part that catches everyone. The net has to be up before the leaves come down, not after they start. Around Philadelphia, Bucks, and Montgomery County, meaningful leaf drop usually gets going in mid October and runs through mid November, though a dry September can pull it earlier.
So we are typically netting ponds from late September into the first week of October. If you are looking at a bare-ish tree and thinking about calling us, the window has already closed. Everything that mattered is already on your pond floor.
Not all netting is equal
A net thrown flat across the water and weighted at the corners will sag under the first heavy rain, sink into the pond, and hold a wet blanket of leaves directly against the surface. That is close to no net at all, and it is what most of the store-bought attempts look like when we show up.
What actually works is a net tented above the water so leaves stay dry and off the surface, edges anchored all the way around so nothing blows underneath, and enough slack tension that it sheds a soaking rain instead of pooling. Around a disappearing waterfall or a stream with irregular edges, that takes some fussing to get right. It is not complicated work. It is just work that has to be done properly to be worth doing.
And then it has to come off
The other half of the job is the half people forget. Once the trees are done, the netting comes off. Leave it up into December and the first wet snow turns it into a hammock full of ice sitting on your pond, which is how nets tear and edges pull loose and stones get dragged in.
For clients on one of our maintenance programs, netting up and netting down are just two visits that happen without anyone having to watch the weather. That is most of why people sign up for them in the first place.
If you only do one thing for your pond this fall
Do this one. Netting is the highest-leverage forty-five minutes in the entire pond year. It protects your fish through the ice, it decides how your water looks next April, and it takes a spring cleanout from a heavy job down to a routine one.
We are booking fall netting and seasonal maintenance visits across the Greater Philadelphia area right now, and the calendar in early October fills up fast because everyone needs the same two weeks. If you want your pond on that list, start a conversation with us or call 215-880-6811 and we will get you scheduled.