The clear patch on the head isn't something I have never seen before, it may be to do with the problem you had? Hopefully you will be sorted now but there may still be deaths if the shrimp are weakened. If the black one iss the only one with that clear patch I would remove it as it shouldnt look like that, but the blue jelly (and others) in the other picture from thee earlier post look fine.
That is one beautiful JADE GREEN shrimp with the racing stripe down the back!
looks like the antibiotics killed off the filter bacteria.
U should dose something that treats ammonia, like Seachem Prime.
Also add filter bacteria like Seachem Stability. Or just wait for your own bacteria to come back.
Also, I forgot to say and ask. Very few of my neos are 1 color. Most have a clear area where organs are, then circled by its color. Let me share a picture.
This shrimp seems like it's black but head area is clear. Most of my blue neos were like that.
Now this one is one of the few that grew up 1 colored, and I have no idea what freaking color it is. I didn't buy it, so I'm sure it's one of my first babies from last September/October. But parents were both blue neos, and it doesn't have a clear area where you can see organs. Is that normal?
Thank you for all the help. I believe the issue was a bacteria. Deaths have stopped so far. Shrimps are very active, they keep molting and there's still 1 berried female. I keep doing water changes until it cycles, and half the tank doesn't have the fuzzy white thing anymore. The other part does still.
I haven't been able to find an ammonia test kit so maybe that was my problem but I woke up to no dead shrimp. Before I do a water change I want to make sure my water I have is correct with water parameters and GH and KH especially. I did cycle my tank and it should be fully cycled by now.
Thank you all!