I have a female ghost shrimp w/eggs which was frantically swimming against the sides of the tank like she wants to get out. I've just done a water change and added iodine (maybe she's freaking out cuz it may trigger her to molt)? I took her out and put her in a separate container (watered it down a bit with fresh water hoping to dilute the iodine) but still the same behavior. I've had a couple of shrimp deaths in the past couple of days and a couple of others seem to be struggling. It seems like the water params (ammonia, nitrite and nitrate) are consistently normal, but I went ahead and did a 40% water change thinking something was funky in my tank. My fish seem ok, but since the water change they seem to be hanging out close to the wall she was targeting, which is close to the filter.