I hear those are all real good. I use Can brand filter just because I always have and they def work better than the cheap filters like active air or store brand generic ones.
I bought cheaper filters when I started and after going through two in about 6 months, I bought a Phresh and haven't looked back. Can't speak about Phat or Mountain Air.
Phat and Phresh used to be the same company but split up. Both use the anti bypass cone in the filter and both use quality carbon. They are the only filters I will buy. I have some that have been running for nearly 8 years now and they still work! Amazing.
