I had read quite a bit here about people buying Cidex, so after some research I bought 450 ml of 25% glutaraldehyde for $29 CDN. Shipping was a bitch, but it should still save a chunk of cash. I could have got 50% for a 1$ more, but it sounds like I'll need a hasmat suit as it is. I plan to mix 40 ml to 460 ml of water.