its a new tank starting a cycle, are you using a substrate? 4 damsels is a LOT to cycle a 24 gallon tank, IMO 3 days is way too soon to add any fish, and since you have a halide I assume your going to go reef, you would have been much better off skipping the damsels and cycling with live rock only, 1) it tends to be quicker and easier,2) no stress on the fish,as there arent any, 3) I'm assuming this is your first tank based on your post, 4 damsels will be pretty close to your max fish load in a 24 gallon, and they will get fairly big if all goes well, and chances are you will wind up wanting to get rid of them when you really get the reef going
your going through the cycle, give it time, eventually the water will clear, and dont add anything else to the tank except for CURED liverock, if you add any uncured, your basically going to reset your cycle