Absolutely! I bought a pair when I got red bugs last year and I was reluctant to dose interceptor. I'd always rather solve a pest problem with a natural predator if possible, but they just couldn't keep up with the RB reproductive cycle. I was heading down to Mexico the day after I noticed the RB, so I wasn't about to dose Interceptor for the first time without being home to keep an eye on the tank. By the time I got home, the tank was plagued with them and a few acros browned out pretty badly. I dosed the interceptor per Marc's directions and Voila! No red bugs in sight. I never saw them again, but I dosed two more times as recommended just to be on the safe side. After using the interceptor treatment a few times, I'd no longer hesitate to do it a day prior to a vacation.