We all have those little items that make this hobby fun and easier to keep up with maintenance. Besides the almighty 5 gallon bucket I’ve found the two other items almost indispensable. The humble dish tray has kept countless drips off of the floor as I change filter socks and service equipment. I use the label maker to label both ends of every cord, plug, and tube on my system which has saved me countless hours when I have to plug, unplug, and reconfigure gear.
What are your items that you would never want to go without?