I have a fluval 404, i feel unsure of the connections from the hoses to the water shutoff valve...... they just don't seem really secure, makes me a little nervous.
See the two pictures attached... the one with both of the collars up is correct, there should be threads clearly visible below it... the second one is with the intake collar lowered and the hose is just on the hose barb, but not secure at all. With the collar up it is very secure and can't be pulled loose.


