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| Too many fish and overfeeding cause surplus nutrients in water |
| Fallen leaves and decayed plant matter |
| Too few plants/inappropriate planting |
| Shallow water (water warms up more, so more algae growth) |
| Pond newly set up, balance may not be right yet |
| Carpet of algae (due to string algae) |
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| Take out fish/feed less/use pontec® pond clear or algae stop |
| Remove leaves and dead plants/suck out, use pontec® sludge vacuum and/or pond filter |
| Change planting |
| Use pond clear or algae stop, change water |
| Remove algae or suck out with pontec® Pondomatic |
| Remove with pond pliers/net/suck out with pontec® Pondomatic |
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| Floating particles |
| String algae |
| Too many fish or overfeeding |
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| Use pontec® pond filter |
| Use pond filter with UVC light. Apply pond clear |
| Remove fish with pond net, feed less |
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| Normal evaporation or evaporation through stream |
| No capillary barrier (seepage through to adjoining planting or earth) |
| leak |
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| Top up water |
| Build capillary barrier, to create a barrier between water and garden planting |
| Repair leak |
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| Pests (bacteria, viruses, parasites) |
| poisonous matter |
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| Use pontec® filter with UVC appliance |
| Use pontec® filter with UVC light. Partial water change |
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| plant pests |
| poisonous matter |
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| Ask the specialist at your supplier |
| Partial water change |
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too high protein or phosphate content
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| Use pontec® pond filter, keep fertilisers out, oversee fish feeding, partial water change |
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