SUNSUN HW-304B/404B/704B Replacement Filter Pad Set

This replacement filter pad set is designed for SUNSUN canister filters including HW-304B, HW-404B, HW-704B, and the 525gph Polar Aurora models. It combines mechanical, bio, and chemical filtration in one comprehensive package.

The set includes 4 sponge bio filter pads (1 coarse, 2 medium, 1 fine) that trap visible debris without restricting water flow. The pads are reusable after rinsing, offering ongoing value. Four chemical filter pads—2 activated carbon, 1 ammonia remover, and 1 phosphate remover—remove discolouration, odour, and dissolved fish waste for cleaner water. Eight white floss pads provide fine particle filtration for crystal-clear results.

Together these pads deliver multi-stage filtration that keeps aquarium water clean and healthy. The sponge pads are robust and long-lasting, while the chemical and floss layers work progressively to catch progressively smaller particles.

Replace these pads according to your aquarium’s load and water conditions. Most users see noticeably clearer water and reduced odour within days of installation. Check the pads monthly and rinse or replace them as needed to maintain peak filter performance.

Order this replacement set today to restore your SUNSUN filter to full capacity.