When I first posted I didn't realize the valves came off the FX5. I've never seen one in real life only in pictures. I'm all about safety and redundancy, though, that's why I suggested the shutoff valves. I've been doing fish tanks and filters for over 30 years and I've seen things break when you least expect it but since it isn't my tank and I won't have to drain it if something goes wrong I really don't give a crap. I was trying to help you out and give you a well thought out suggestion but since you already know everything.......addicted2cichlids;1828416; said:also, why would the valve break on the fx5? it wont! so dont worry about it!