My criteria are:
- Color coding so I know what TYPE of appliance the plug goes to.
- Pictures or numbering on both ends so I know the plug on this end goes to the heater in tank xx at a glance. Therefore the heater end must be durable for underwater exposure, etc.
- Sleek and not cluttery; there is ALREADY a big mess from just the cords themselves. I prefer not to have strings, tape, or tags hanging off if possible. That's why those buttons appealed to me so much; they are very streamlined.
- Easily removable and yet hard to dislodge accidentally; re-useable and reposition-able (if a heater burns out I want to take them and put them on the new heater, etc.)
- Sorta cheap.
So far, DK has solved the color coding, using split pieces of colored tubing. It is quite secure on the cord: