I'm new here but I've been keeping aquariums, off and on, for over 50 years. Small-scale, nothing elaborate or exotic. Things have changed a lot in those years, but there's one item of equipment that I've lost along the way and to my amazement doesn't seem to exist anymore, anywhere. Everybody used to have one. You never really needed more than just one. Can you guess what it is? The dip tube! I'd find one to be very handy in my freshwater shrimp tank right now, but I've searched online to the four corners of the earth without managing to locate one. I'll make my own if I have to, but before I do, does anybody here have any idea where one might be found? I'd be very appreciative!