Got some red rili yesterday, and I dripped them at two drops per scond until the container was 9/10 tank water. That night, I thought they were all doing well, but this afternoon, I found a dead one on top of the prefilter. One of the living ones is acting strangely now. It keeps swimming upwards, and kinda drifts backwards and lands upside down sometimes, get's back up, doesn't move much, and repeats it. It's not exactly whitish, but ti's translucent. How translucent should red rilis be? The other two bigger ones (not big, but have clear markings) seem to be doing fine, as well as all of the juvies. Advice please?