17" x 11" Replacement Pond Filter Foam Sponge
Garden Fish Pond Replacement Filter Foams - Set of Three supplied
Foam does not last forever. Once it has compacted or clogged past the point where rinsing helps, flow through the filter falls away and biological performance goes with it - which is the moment to fit a fresh stack.
This set covers all three grades in one purchase: profiled three-layer foams measuring 17" x 11" / 43cm x 28cm, comprising 1x coarse (Black), 1x medium (blue) and 1x fine (green), for use in gravity-fed flow-through filters.
Rather than changing everything at once, inspect the foams regularly and replace them in stages - that way the bacteria colonies in your filter stay healthy.
Each foam can be cut to size and trimmed around pipework if required.
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