Can I snip the top open of a filter cartridge, so high that water will not flow into the cartridge from the top, then place new media such as phosguard, chemi pure, or bio balls?
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Can you cut open a filter cartridge from a HOB filter and add new media?
Can I snip the top open of a filter cartridge, so high that water will not flow into the cartridge from the top, then place new media such as phosguard, chemi pure, or bio balls?
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