oh my god, dude. i can't believe you let them talk you into this mess. i think you did it all wrong. but what's done is done. i would buy some bio-spira, shot the machenical filtration off for few hours to allow bacteria sattle into the tank, start doing testing for ammonia and nitrite just to monitor the tank for at least a week. do not leave your rock out of the water. do not do anything to your sand. in fact, do not continue fighting aiptasia, you'll beat it with couple of peppermints, don't worry. it's just large peppermints mostlikely will have a taste for anemones already developed, that's why i recomended only big once. what you are doing to your tank is not worth it. calm down with aiptasia. the problem at this point though is i don't know if your system even stable enough to house shrimps. it just if you kill live kritters you also kill bacteria that makes your system stable. i don't know how badly you messed up your rock, i hope not too bad, which is you'll know when your tests will be showing okay results. maybe adding some Prime for assurance would be also good, but that might throw test kits off, not sure. never do what you did again, i don't care what the problem is, there are other ways of fixing it without killing everything. i used to have thick brush of aiptasia on my glass, gravel, and rocks, but now with my peppermint in one tank and copperband in another, i have a friend at the fish store who sometimes gives me small pieces of rocks with aiptasia on them for my guys to play with because i don't have any aiptasia left. good luck.