Hi, I am looking to set up a 75gal soon, and am considering what filter to get. I have run across several posts on this and other sites where people tell about canister filters that leaked and siphoned all the aquarium water out onto the floor. Obviously this would be a disaster worth avoiding. My question is: are all canister filters susceptible to this? Or only certain kinds? What, if anything, can be done to make sure that doesn't happen? Is the risk of this great enough that someone should use a HOB instead? Thanks for any advice!