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Would you believe me if I told you that shrimp can retain the male's sperm for a period of time to inseminate a second batch of eggs? I can't prove it as fact, just my observation and it is not uncommon in the Invertebrate world. It's easier to observe in glass shrimps. I can't prove it because I can't see shrimp sperm, let alone shrimp sperm inside a female. But it would explain your situation @kms. The eggs develop in the female's ovaries, near the top (top as in from our point of view if we look at it from top down). We can see the yellowish unfertilised eggs and we colloquially call this the "Saddle". As the male fertilises the female, the sperm is stored in a "pouch" (that's not the technical term by the way). The eggs become fertilised when they pass through the sperm on the way to the brood pouch formed by pleopods. We call this the "Berried" stage when we can see the fertilised eggs externally. Interesting huh?

That's true, but the don't all go grey, it depends on the type of shrimp. Some go brown, or even green.

Thats very interesting JayC. I had heard that on a youtube video but wasn't sure whether it was true or not as I watch a lot of them and only heard it the once, so didn't mention it prior! You may have solved KMS mystery? Do you know whether the yolk theory is correct, where the eggs start yellow (yolk) and go greyer (clear as they are all born clear) as they get older as the yolk is absorbed by the shrimp. Again, something I saw on a video and it made complete sense to me, but do you know? I have seen it with the red cherry so know that is true but do the others do it, it is hard to see eggs/saddle with bee shrimp? Simon

Change water with RO + Salty Shrimp mix where the change water's TDS is lower, eg if you are aiming for 200, adjust your change water to 200. Only use pure RO water if you are topping up the tank due to water loss through evaporation. What's your TDS now?

Thought I'd update you guys. Since I posted last I didn't do a water change for a few weeks. Haven't had any other dying shrimp. Just a question. When the TDS is too high do you still fi a water charge with normal RO water with the salty shrimp mix? Or do you do some of that with straight RO water to bring it down more?

An English version would be great ?