Low or uneven flow can have several causes, including low water level, a blocked intake, debris in the gravel, pump wear, plumbing problems, or water escaping from the feature. Start with the safest checks and do not open or modify a component against its instructions.
Check the obvious causes first
Turn off power before inspecting the system. Check the water level, intake area, visible debris, and the pump’s condition. Look for leaves, sticks, sediment, unexpected pooling, or flow that is bypassing the intended channel.
Inspect accessible gravel and basin areas
If the system instructions permit it, remove loose surface debris and inspect the accessible gravel. Do not dig into a reservoir or lift covered components without understanding the liner, plumbing, and access design. A recurring clog may indicate a drainage, debris, or layout problem that needs professional help.
Clean and test carefully
Use only the cleaning method described for the current system. After reassembly, restore the proper water level and test the feature. Watch for leaks, uneven flow, pump noise, or a water level that drops quickly. Turn it off again if the pump is exposed or the system is not holding water.
FAQ
Could low water look like a clog?
Yes. Evaporation, splash, a leak, or water trapped in the stream can reduce the water available to the pump. Check water level and loss patterns before assuming the gravel is blocked.
Should I pressure-wash the gravel?
Only if the current system instructions permit that method. Aggressive cleaning can disturb the liner, plumbing, or intended media arrangement.