They are discontinuing the making of the Aqua Kem with formaldehyde. We have used a bunch of different chemicals and nothing works as well at breaking down of waste and keeping the smell down as this one. The only place I could find it was on Amazon and sometimes it’s hit or miss. Check prices when purchasing there is price gouging with some sellers. I highly recommend you get this stuff and stock up while you can. It’s totally worth it. Also, I put a capful of unstoppables in the toilet as well which gives a even fresher scent.