Hmmmm I have had my clowns and six line for over 6 months now and no signs of jumpers.... but I think I'm going to build a screen top sooner or later. Still finishing my stand and what not so I'm getting there lol.
Like our houses, never ending projects lol
Place the screen top at your top of tank things to do list, sooner or later it happens. Carpet surfing for no known reasons happen, and with a wrasse times a ticking.