Im 90% certain. These two individuals were deformed which made it difficult for them to feed/swim especially scavenge at the bottom like the others do.Sorry for your loss. Would they have died from starvation after just a week though?
White Ring Of Death. Unsuccessful molts of a shrimpI do have one question; what is WROD? Hubby wants to get Cherry Shrimp for the Betta tank so I’m just doing as much research as poss as we’ve never kept shrimp before.
White Ring Of Death. Unsuccessful molts of a shrimp
"Bad, or failed molts are usually linked to too large of water changes, a poor diet, or wrong parameters (GH, KH, PH). When shrimp are lacking the key elements of their parameters, they are unable to grow, and shed healthy exoskeletons. You may notice this in the early stage as the “white ring of death” which looks like a solid white band around the shrimp where the head meets the body. A healthy shrimp will split just at the top of it’s head, allowing it a clean break, or molt, out of its exoskeleton. When the ring appears, it makes doing this more difficult, and a shrimp may die in the process of trying to molt, because it can get stuck while trying to do so." - Buceplant
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The bloody mary cherry shrimp I kept were prone to this. This was the first time I had kept neocaridina shrimp. I couldn't figure out the cause and went from 15 shrimp to now 2 remaining. I tried Mineral blocks, organic salad leaf diet, reducing water changes to 10-15L a week, and even introducing a cuttlefish bone to boost the hardness all of which didn't work. I've since bought some lower-grade cherry shrimp and had no deaths in the month and 2 days I've had them now. I still struggle to understand neocaridina shrimp. I've kept amano shrimp much longer and never had any issues like what my RCS had. My guess is that water parameters caused the problems as I have softer water.
Just a word of caution - many bettas will eat cherry shrimp so I suggest just a couple to test the betta, then if s/he's OK with them you can get more. I've had a betta which ignored even baby shrimp, one which ignored adults but ate babies, and one which dismembered shrimps - there were shrimp bits all over the tank.Hubby wants to get Cherry Shrimp for the Betta tank
Just a word of caution - many bettas will eat cherry shrimp so I suggest just a couple to test the betta, then if s/he's OK with them you can get more. I've had a betta which ignored even baby shrimp, one which ignored adults but ate babies, and one which dismembered shrimps - there were shrimp bits all over the tank.
. It was a painful chore as duckweed was everywhere. Hidden behind the heater, the internal filter, even hiding underwater amongst the Bolbitis! Sadly I also had to remove 90% of the water lettuce and frogbit as they were infested too but I managed to save a handful by carefully picking away at the duckweed with tweezers. I don't doubt they will multiply within the coming weeks. I also installed my new APS EF-150 which seems to be doing ok so far. A little vibration and trapped air are still audible at a close distance but great overall. I'm thinking of cleaning this new filter monthly rather than weekly compared to my internal filter. I also added in some Limnophila aromatic and Vallisneria spiralis rubra a few weeks back which sadly haven't taken off as well as I'd hoped. Out of 7 stems of the Limnophila, only 3 remain and barely any new leaves from the Val have come up. I believe lighting may have been the issue as the duckweed and other floating plants covered the back 1/3 of the tank which is where these plants were located. Hopefully with the majority of floating plants gone they have access to more light. Another new thing I started last week was using liquid ferts! Something I've not used since my TOTM back in December. Hoping it will improve growth! Pics now 
Just read through your whole journey and your tank has come a long way! It's amazing how much it's grown in. The algae looks like black beard algae - it's stubborn but not as annoying as hair algae.I thought I'd change up the background