I strongly discourage anyone from doing business with Pet Mountain. Recently, I purchased some pond filters that were advertised as "12 count (6 x 2 pk). What I received was 6 single packs. Pet Mountain tried to claim that I misunderstood the ad, yet within an hour after I contacted them about the problem, they changed the wording to "6 count (6 x 1 pk). They refused to provide me with the missing items and refused to refund 50% of the purchase price. And don't even try to call their customer service number... you will be on hold for 10 minutes and then sent to voicemail. And you will never get a return call. I filed a complaint with the BBB and was not surprised that many have done so before me.