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Fluval SEA Hydrometer for aquarium saltwater treatments, showing a clear, easy-to-read scale in a compact design.

Digital Fluval SEA Hydrometer for aquarium saltwater specific gravity measurement, essential for marine tank treatments.

Fluval Fluval SEA Hydrometer

Sale price£7.99

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Pond Liner Calculator

Enter your pond measurements below. Decimals are accepted, for example 1.5.

Metres Feet

Pond length Pond width Maximum depth Edge overlap

Calculation: liner size = pond size + twice the depth + overlap.

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