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Is that the same type of Filter Pad that is in my Tetra Hang on the Back Whisper Filter?
Or is it made up of something else to change color?
Is it some chemical reaction that makes it blue, green, red, etc?
My Tetra Filter Pads do not do change colors like that but it looks like a Tetra White Filter Pad to me just bigger in size.
Am I missing something?
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