Pond filters, aquarium filters and UV-C

Q: How do I size a pond filter?

Manufacturers give three volumes: without fish, with fish and with koi. For the EHEIM LOOP filter, that ranges from 5,000 to 15,000 L without fish, from 2,500 to 7,500 L with fish and from 1,300 to 3,900 L with koi. Use the figure that matches your stocking level.

Q: What UV-C steriliser wattage should I choose?

It follows the same logic. The 7 W model of the EHEIM Clear UVC treats 7,000 L without fish, 3,500 L with fish and 1,800 L with koi; the larger models go up to 60 W.

Q: When should the UV-C lamp be changed?

Before it goes out: its germicidal power drops sooner. The EHEIM product page gives about 8,000 hours, and the Newa Pure Light page 5,000 to 6,000 hours, or 8 to 10 months in an aquarium.

Q: How should biological media be cleaned?

Rinse them in tank or pond water, never under the tap, and never all at once: that way you keep the bacterial colony that has settled on them.

Q: What dose of starter bacteria?

In aquariums, Easy-Life EasyStart is dosed at 10 ml per 50 L on the first day, then again after one and two weeks. In ponds, IchiPond Optinit is dosed at 15 g per cubic metre, in water above 10 °C. A nitrite test shows when the colony is established.

Produits du rayon Filtres de bassin chez Univers Aquaponie

Pond filters

Aquarium filters

Filter media

UV-C sterilisers

Reverse osmosis units

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Aquael PAT MINI and TURBO FILTER 1000 internal filters side by side on a white background, to scale

Aquael internal filter for aquariums, adjustable flow rate

From 14,90 €

Aquael UltraMax external filter, black canister seen from three-quarters with its two taps on top

Aquael Ultramax 1000 or 2000 external aquarium filter

From 154,90 €

-50% on a selection of fish food

Aquael UltraMax 4500 L/h external filter pump – high-power canister filter for aquarium and aquaponics

Aquael Hypermax 4500 BT external aquarium filter

435,90 €

Small black cascade filter with its straight intake tube, model for nano aquariums

Cascade filter for aquariums Aquael FZN PRO

From 23,90 €

Sicce external filter, anthracite grey canister seen from three-quarters with its taps and its lid with blue clips

Sicce Mega Filtra external aquarium filter, up to 950 L

From 234,90 €

External filter with green tank and grey pump head, model for a 250-litre tank, three-quarter view

EHEIM classic 150 to 600 external aquarium filter

From 66,90 €

Aquael Skimmer SAS 500 surface skimmer with its float, front view

Aquael SAS 500 surface skimmer for aquariums

19,90 €

ARKA myAqua 190 reverse osmosis unit with no electricity: central membrane between the carbon pre-filter and the fine filter, blue pipes

Compact reverse osmosis unit ARKA myAQUA 190, 380 or 400

From 49,90 €

White fine pre-filter and carbon filter with black labels, side by side, for reverse osmosis units producing 190 and 380 L per day

Cartridges and membranes for ARKA myAqua 190, 380 or 400 reverse osmosis units

From 7,90 €

White fine filter refill for a 1,900 L per day RO unit, threaded end cap at the top

Replacement cartridges and membranes for ARKA myAqua 1900 or 3800 reverse osmosis unit

From 17,90 €

Dupla RO 200 reverse osmosis unit for aquariums

Dupla RO 200 reverse osmosis unit supplied assembled, no electricity needed

79,90 €

ARKA myAqua 3800 L per day reverse osmosis unit, white housing and its four filtration cartridges lined up

ARKA myAQUA 1900 or 3800 high-capacity reverse osmosis unit

From 309,90 €

Pile of black plastic bio balls with fins, biological media for a pond filter

EHEIM bioballs for pond filters

From 18,90 €

Sheets of honeycomb filter media in four colours side by side, including the blue one, seen edge-on

Filter foam sheet to cut to size, 1.2 m²

74,90 €

Clarifying activated carbon for filter – filtration media for aquarium, pond and aquaponics

EHEIM Karbon activated carbon for aquarium filters

From 9,90 €

15 products out of 56

Complete filtration runs through three stages. Mechanical pre-filtration (foams, filter wool, ceramic noodles) stops particles; biological filtration houses the bacteria that convert ammonium into nitrate; the UV-C clarifier eliminates the suspended algae that turn water green. EHEIM SUBSTRATpro balls, for example, offer 450 m² of colonisation surface per litre, placed after the pre-filtration.

A pond filter is sized according to volume and stocking level. The EHEIM PRESS 10000 filter handles up to 10,000 L without fish, 5,000 L with fish and 2,500 L with koi: the fish load halves the capacity, and quarters it with koi. To start up a new filter, starter bacteria speed up colonisation; in ponds, IchiPond Optinit is dosed at 15 g per cubic metre, in water above 10 °C. The collection also includes UV-C sterilisers and reverse osmosis units. To understand the role of the biofilter, read the article on the nitrogen cycle in aquaponics.

Frequently asked questions

How do I size a pond filter?

What UV-C steriliser wattage should I choose?

When should the UV-C lamp be changed?

How should biological media be cleaned?

What dose of starter bacteria?

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