B1G1 Free GE SmartAire Cut-to-Fit Replacement Carbon Pre-Filter - $6.77
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Amazon is currently running a buy 1 get 1 free promo on this pre filter carbon activated pad. This pad is 15 3/4" x 48" in size for a 756 square inch area. You can cut it up to size and fit it in your HVAC, air purifier, aquarium filters etc. The carbon pad goes before your actual filter.
This is pretty cheap rather than buying pre-cut pads that could run up to $24 for half the area of this pad.
Just add 2 to your cart, discount taken at check out.
https://www.amazon.com/gp/aw/d/B0...5136310273
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