The Home Growns
DIY System 5: Install an Intake Bay and Rock Trap Prefilter
If your yard drops leaves like it’s getting paid for it, build this. An intake bay is a simple prefilter zone that catches the ugly stuff before it reaches your planted systems and pump.
Why prefiltration matters so much
Leaves, pollen, and grit break down into nutrients that fuel algae. A good prefilter removes that load early, which means every downstream filter works better.
This is the boring hero of natural pool maintenance. I never skip it now.
Build the intake bay simply
Create a chamber where incoming water slows down before moving onward. Use stone, mesh, or a screened basket area to let heavy solids settle while floaty debris gets captured.
A shallow stone pocket near the entry also helps. It’s low-tech and weirdly effective.
Add a rock trap for heavier debris
A rock trap uses larger stone or a small sump area to catch sediment before it reaches plumbing. That saves wear on impellers and reduces sludge in your gravel biofilter.
This matters even more if your pool is near mulch beds, gravel paths, or windy tree lines. Ask me how I know, because one spring storm basically dumped half my yard into a water feature.
Place it in the right spot
Put the intake where debris naturally collects or where water returns from the pool surface. Think of it as the first handshake in the circulation path.
This setup gets the mess under control, but surface cleanup still needs a dedicated tool. Click the next button below, because a skimmer-and-waterfall loop adds oxygen, movement, and that lovely resort vibe.
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