SunSun HW-704B Aquarium External Canister

20,500.00

he basic principle is – from the bottom up –:

1ˢᵗ stage: mechanical filtering
2ⁿᵈ stage: biological filtering
3ʳᵈ stage: chemical filtering (e.g., activated carbon, phosphate Ex, etc.)

4-stage filters can be extended by a mechanical or biological filter stage as required.

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