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The Juwel blue filter sponge house the most important bio - cultures, which are responsible to effectively clean the aquarium water. You should clean or replace one sponge at a time every 3 - 6 months to maintain the right biological balance in your aquarium. Content: 2 pieces
Juwel bioPlus fine ONE blue Filter Sponge suitable for the Juwel Filter ONE, Aquariums: Juwel Primo 60, Primo 70.
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