AquaReale — Philadelphia pond contractors and water feature specialists

    Pond Problems & Solutions

    Something wrong with your pond? Diagnose the issue and find expert solutions. If you need help, we're just a call away.

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    Common Pond Problems

    Green or Cloudy Water

    Green water is caused by suspended single-cell algae. Cloudy water usually indicates a bacterial bloom or suspended sediment. Both signal an imbalance between nutrients, sunlight, and filtration.

    Common Causes

    • Overfeeding fish
    • Inadequate filtration
    • Too much direct sunlight
    • Decaying organic matter

    Solutions

    • Install or replace UV clarifier bulb
    • Increase plant coverage to 50–70%
    • Add beneficial bacteria weekly
    • Reduce fish feeding amounts
    Algae Control Services

    Pond Losing Water (Leaks)

    If your pond drops more than 1–2 inches per week (beyond normal evaporation), you likely have a leak. Common causes include liner punctures, settled edges, plumbing failures, or waterfall leaks.

    Common Causes

    • Liner puncture from roots or rocks
    • Settled pond edge allowing overflow
    • Cracked plumbing connections
    • Waterfall splash-out

    Solutions

    • Professional leak detection assessment
    • Liner patch or replacement
    • Plumbing repair or rerouting
    • Edge re-leveling and stone reset
    Leak Repair Services

    Pump Failure or Noise

    A failing pump may run loudly, intermittently, or not at all. This is urgent — without circulation, oxygen levels drop and water quality deteriorates within hours in warm weather.

    Common Causes

    • Clogged impeller from debris
    • Worn bearings or seals
    • Electrical issues
    • End of pump lifespan (3–7 years)

    Solutions

    • Clean impeller and intake screen
    • Lubricate or replace bearings
    • Check GFCI outlet and connections
    • Replace with properly sized pump
    Pond Repair Services

    Sick or Dying Fish

    Fish health issues often stem from water quality problems. Symptoms include lethargy, loss of appetite, white spots, red streaks, ulcers, or erratic swimming.

    Common Causes

    • Poor water quality (ammonia, nitrite spikes)
    • Parasites (Ich, flukes, anchor worms)
    • Bacterial infections
    • Oxygen depletion in warm weather

    Solutions

    • Test water parameters immediately
    • Quarantine affected fish if possible
    • Treat with appropriate medication
    • Improve filtration and aeration
    Koi Pond Services

    Predator Problems

    Herons, raccoons, cats, and even hawks can decimate a fish population. Great Blue Herons are the most common predator in the Philadelphia area and can eat 6+ fish in a single visit.

    Common Causes

    • Shallow pond edges
    • No fish hiding spots
    • Open, unprotected pond
    • Nearby wetlands attracting herons

    Solutions

    • Install motion-activated deterrents
    • Add fish caves and tunnels
    • Increase pond depth to 3+ feet
    • Use protective netting during peak season
    Pond Renovation Services

    String Algae & Blanketweed

    String algae (filamentous algae) grows in thick mats on rocks, waterfalls, and pond edges. While some is natural and even beneficial, excessive growth is unsightly and can clog pumps.

    Common Causes

    • High nutrient levels
    • Excess sunlight on rocks
    • Insufficient competing plant growth
    • Infrequent cleaning

    Solutions

    • Hand-remove and treat with barley straw extract
    • Add competing aquatic plants
    • Install IonGen or automatic dosing system
    • Increase biological filtration capacity
    Algae Control Services

    Pond Problem FAQs

    Green pond water is caused by millions of microscopic algae cells suspended in the water (an 'algae bloom'). This happens when nutrients (from fish waste, decaying leaves, or overfeeding) combine with sunlight and warm temperatures. The most effective solutions are a properly sized UV clarifier, beneficial bacteria, and adequate plant coverage.

    Not necessarily. Ponds can lose 1–2 inches per week to evaporation, especially in summer with a waterfall running. Test by turning off the waterfall for 24 hours — if the level stabilizes, the leak is in the waterfall or stream. If it keeps dropping, it's likely a liner or plumbing issue. Start with a free phone consultation. If finding the leak needs an on-site assessment, that visit carries a fee, which we quote on the call before scheduling.

    Watch for: clamped fins (held close to body), flashing (rubbing against rocks), white spots, red streaks or ulcers, hanging at the surface or bottom, loss of appetite, or erratic swimming. Any of these warrant immediate water testing and possibly treatment.

    White foam is typically caused by dissolved organic compounds (proteins) from fish waste, decaying matter, or spawning activity. It's usually harmless but indicates the need for a partial water change, skimmer cleaning, and perhaps increased aeration.

    Reduced waterfall flow usually means a clogged pump intake, dirty filter pads, a partially blocked pipe, or a failing pump. Start by cleaning the skimmer basket and pump intake screen, then check filter pads. If flow doesn't improve, the pump may need servicing or replacement.

    Yes, but you MUST dechlorinate it first. Municipal water contains chlorine and chloramines that kill beneficial bacteria and harm fish. Use a liquid dechlorinator or install an inline carbon filter on your garden hose. Small top-offs (under 10% of pond volume) with a slow hose are generally safe.

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