So, I found an unopened Aqueon Quietflow 30 in my house the other day and I thought it would be perfect for my upcoming 20 gallon shrimp tank (with a prefilter sponge of couse), but as I was assembling it, the intake pipe was completely loose, and it just falls out when you turn it around. It says it is supposed to be adjustable in height, but I don't see how it is even supposed to stay on the pump. If anyone has any ideas on how I can make it stay in the pump that would be greatly appreciated! 
