I have a 220ltr tank been running 3 years a while ago they stopped breeding that's CRS &black bee in the same tank so I separated black bee and within two months the bl/bee are breeding yet the big tank still nothing water is ph6.5 gh5 kh1 temperature 23c those readings are the same in the 10ltr black bee, I do 15% water changes in all my shrimp tanks, I'm wondering should I do a big water change in the 220ltsi can't for the life of me think of what else to do, they have not bread for 6 months
So i thought I might update this thread for any others experiencing necrosis issues. Thanks once again for your advice @jayc!
After 3 treatments of oregano oil, (at @jayc‘s recommended dosage with 3 different foods, 2 x commercial pellets, one of fresh blanched peas) AND increasing my 20% weekly PWC change to 50% twice weekly - my deaths in this tank have stopped. There are still a few w/advanced stages of cell degeneration showing. It appears to have stopped in its tracks for now.
First berries in 6-8 weeks have just been spied also. Perhaps too early to say if the issue has stoped completely.
Oh, wow! That really is a surprise then!
Maybe your best bet will be to set up a breeder tank which you can then transfer them later into the bigger tank, I guess that will help with getting the best colours possible as well, selective breeding etc?
Clutching a bit at straws here, but, It may be worth doing a significant water change if that is an old tank and usually only has a small change. Fresh water usually seems to excite my shrimps and I have noticed this often happens, I guess it is the equivalent of rain falling in the wild and seems to encourage moulting and frantic swimming!
I would wait and see if anyone else has any useful advice on here first though as it is quite likely someone has had your same experience and will know what to do but they may be in a different time zone etc so give it a day or so.
That plan to set up a small tank though is a good one and worth a bash, especially if you already have an old one lying about anyway. I do have some links on my computer so will read those and see if that throws anything up and let you know if I come across anything, probably be tomorrow now though!