Might try dosing with Calcium Montromilite.... I feed Bio plus weekly and EI every 3 days and my nitrates stay at 0... But I do have tons of floaters
I dose that with water changes once weekly. Teensy pinch.
Oh, and testing nitrates in my other tank right now that gets fed more powdered foods due to the amount of babies in it and Nitrates are reading at 5ppm. So nitrate test is looking to be fairly accurate (quite a bit more plants in this other tank that are fast growers that probably helps compensate for the powder foods).
I have some Shield on hand but have never had any luck using it or rather haven't noticed it helping much. But at this point I'm a little desperate to stop the random deaths. I've got two batches of babies in there right now with the oldest batch being a week old so no real way to see how survival rates are going to be just yet.
And Liam, I just started feeding baby food to this problem tank last week. My other tank has had babies in it for 3 weeks so I've been feeding it for longer and more of it. And the TDS has gone up on it as well. Funny enough, I WANTED the TDS higher in that tank...LOL. I didn't realize the powdered foods would raise the TDS. Something for me to keep in mind next time I need to raise it without altering the GH. Learned something, thank you!
so I guess with the guesses being thrown out nobody really sees anything glaringly wrong with the parameters I listed??
I'm willing to hear any and all guesses just know I've got two other shrimp tanks and this is the only one that is being an issue right now. All tanks are treated equally, again, except for the cray and shrimp tank which is fed daily so as to keep the crays from killing each other or killing all the shrimp
ETA: The shrimp that I have been losing the most of are the CRS. I have lost one CBS since the start (and one died during overnight shipping) and one golden. The rest have been CRS. Mainly small subadults except for one older adult and the breeding age adult I lost today that had her babies last week. Granted she had been stressed during her pregnancy but I would have expected the problems while she was berried, not afterwards.