They will die without acros over a given time.. not sure how long of a time period thou it’s been years since I’ve dealt with them.. the good news is you only got 3 acros and I’m assuming just frags.. either dose interceptor or toss the frags and cut your losses… you can try dipping the frags every couple days in hopes of killing them off and their eggs if you wanna give that a shot. But it only takes a couple eggs to start the whole processes over.. gotta be vigilant if you’re gonna go that route.