How to Maintain a Landscape Pond: Seasonal Care Guide

Essential Pond Elements

Proper maintenance depends on pond size, type, and construction materials. Key elements:

• Liner: flexible synthetic rubber, PVC sheeting, rigid plastic, or fiberglass — contains water, prevents leaks
• Sand bed: resting spot for liner (clay or concrete less common)
• Edging: stones or concrete pavers — prevents surface water contamination

Create a dream water garden.

Maintenance Routines

Counterintuitively, large ponds often need fewer steps than small ones — small ponds fluctuate more in ecology/chemistry. All ponds need weekly maintenance, with extra work at season transitions in cold climates. Build your own outdoor water feature with our how-to.

Spring Maintenance

• Clean pond bottom if >1 inch muck (drain, hose liner)
• Locate/patch leaks with repair kit
• Reinstall/replace pump and filter
• Top off water by trickling at bottom (prevents salt/mineral buildup)
• Skim leaves/debris (prevents toxic gases)
• Add oxygenating aquatic bunch plants
• Divide potted plants for vigor
• Start feeding fish high-carb food
• Move frost-sensitive tropicals from winter storage
• Divide/replant water lilies, lotus, marsh plants
• Add new floating/submerged plants at 50°F+ (controls algae)
• Fertilize potted plants

Choose plants for your pond. Learn to care for pond plants.

Summer Maintenance

• Top water level as needed — large amounts rarely, small amounts often
• Test water chemistry weekly (ammonia, chloramines, chlorine)
• Trim plants, remove dead material, pull dying submerged plants
• Check filters/pump intakes weekly for clogs
• Add fountain/bubbler for aeration (hot water = oxygen-depleted)
• Monitor fish for sores/unusual behavior
• Control plant pests; manage algae with brush/rake/pole
• Fertilize potted plants monthly with aquatic tablets

Learn more about landscape pond fish.

Fall Maintenance

• Skim/net falling leaves; use netting secured with bricks/rocks if many trees
• Reduce fish feeding; stop at 50°F (undigested food kills fish in winter)
• Move non-hardy plants/fish indoors; if pond won't freeze solid, move hardy submerged plants/lilies/lotus to deepest part after trimming foliage
• Disconnect, drain, store filter and pumps
• Drain water lines/fountains (siphon if needed)

Winter Maintenance

• Float wood or ball on surface to absorb ice expansion pressure
• Keep air hole open with bubbler/air stone (releases toxic gases, prevents freeze-over)

Get ideas for landscape ponds.