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I really hope that the tank settles down and the remaining shrimp survive! I had a very similar experince with my caridina tank earlier this year so I know your frustration. I never got to the bottom of what caused my problem, but in order to maintain my sanity put it down to the diferent substrate. All the parameters are, and always have been ideal and I have tried shrimps in 3 batches all with no success? The whole tank/plants looks very unhealthy, but for now I have fish in the tank and they are doing great. I should probably redo the tank completely with all new substrate etc but am having a break until the fish die off. I will revert to the substrate I used before next time. The only other possible problems that MAY have caused this would have occured due to poisoning, aerosol, dirty hands with cleaning agents or something like that, but I think they are quite unlikely in reality and I've not had a similar problem before in any aquarium? Caridina shrimp are super sensitive and fragile! I really hope you managre to sort your problem out before you lose all the remaining shrimp! Simon

Sorry to hear 2 more were lost. Hopefully that will be the last one lost. How many more shrimps do you have in the tank? Nitrate is still moderate to high even after that 25% water change, so that means a lot of ammonia has been converted. You might want to do another smaller water change soon. Maybe 10-15%.

Will check when I get home tonight

How is your Nitrate readings now and have the deaths stopped yet?

Maybe like 6-8 more left I will do 10 percent water change today

Lost 2 more nitrate 20-30 nitrite 0 ammonia 0 tds 130