2+ years of continuous use and not a single hiccup. But, you're right, 2 filters is always a better option in case one craps out. That's why last summer I also hooked up a Sunsun canister to the 75.I could do that too. I hear good things about the Emperor series. I just thought of doing two HOB filters for added flow and if one fails for some reason, the tank wouldn't be without any filtration.
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