Not needed...
Solids are 75% water, so they break up in liquid fairly quickly and dissolve within hours without any "digesters." Quick-dissolve TP breaks up almost as soon as it gets wet. So "digesters" in holding tank products are just a marketing ploy, 'cuz agitation is the only way to speed up the rate at which solids dissolve in water.So if you have to dump the portapot tank before the solids have time to dissolve, shake the tank vigorously first to break 'em up.