The Poly Filter’s unique chemical filtration properties offer advantages for
the beginner fish owner and the experienced aquarist. Poly Filter does what
other filters simply cannot when it comes to the removal of medication and
antibiotics. Avoid overdose and water toxicity, Poly filter removes medication
quickly as to not poison the fish, yet slowly enough to not shock the fish. The
Poly Filter is unlike anything else on the market today. “It Just Makes Keeping
Fish Easier!” The color guide goes as follows: red = aluminum, orange = iron,
yellowish green = ammonia, light green = free copper, blue = copper salt, and
brown/black = harmful organic materials. QTY 3
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