Loc-Line fitting are great for your return lines. The various Loc-Line fittings allows you to direct the water flow and create the perfect flow pattern.
Flexible Joint 6” Socket - flexible tubing allows you to direct water flow where needed. Multiple pieces can be used to create longer or shorter lengths.
I would definitely recommend adding these little guys to your tank. They are very playful and entertaining. My three were very healthy and quickly adjusted to my tank.