Check what your skimmer is doing and work through the most likely fixes in order.
The Pool Skimmer Companion Guide goes beyond the symptom checker with skimmer anatomy, water level, weir operation, suction, diverters, skimmer/main-drain relationships and practical troubleshooting.
A pool skimmer depends on the correct water level, open suction lines, clean baskets, a working weir door and a sealed pump system. When one piece is wrong, surface debris may stop moving toward the skimmer or air may enter the circulation system.
Weak pull is often caused by a clogged basket, dirty filter, closed or poorly balanced valves, low pump speed or debris near the pump impeller. Start with the simple checks before assuming the underground line is blocked.
Air entering the suction side can reduce skimmer performance and cause bubbles at the returns. Common sources include low water, a damaged pump-lid O-ring, loose drain plugs, leaking unions or a suction-line leak.
When one skimmer is strong and another is weak, valves may be unbalanced or one line may be partially clogged. A completely inactive line may need additional troubleshooting or professional testing.
Return direction affects skimming. A gentle circulation pattern can help move floating debris toward the skimmer instead of allowing it to collect in corners.
Start with water level, baskets, filter condition, pump operation and valve position. Those common issues are easier to rule out before investigating a clogged or leaking suction line.
Bubbles can indicate air entering the suction side. Low water and pump-lid sealing problems are common places to start looking.
Yes. The weir helps concentrate surface flow into the skimmer and helps keep collected debris from floating back into the pool when the pump stops.
Some systems allow suction to be balanced between the skimmer and main drain, but identify the plumbing and understand the valve arrangement before making changes.
Your skimmer does more than catch leaves — understand how it really works.
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