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This little lady gave birth a couple of days ago (second pic of shrimplets) Sent from my Elephone P8000 using Shrimp Keepers Forum mobile app Also got this really great pic of one of my red cherry girls who flicked her swimmers just as I took the photo. There are oodles of shrimplets in the tank so no pic of hers lol. Sent from my Elephone P8000 using Shrimp Keepers Forum mobile app

The co2 is strictly for the plants only. Carbon is Used for the plants to grow. Shrimps, like other living creatures need oxygen. Additional co2 does them no good, in fact, co2 will only cause additional pH swings that the shrimps won't like. So if your plants are doing fine, don't add any co2.

I am guessing that the top of the sponge was near the surface of the water, if so the shrimp where in effect trying to escape the conditions they didn't like. I do suspect that the problem arose from the temperate shock, a gradual increase or decrease over a matter of days they may adjust to quite well but such a quick change even with drip acclimatisation to get them used to the new pH and gH was just too much too soon. I am sorry for your loss I learnt the hard way (after a few hundred dollars being spent buying them) that crystal reds and that ilk just do not like the hot temperatures I get here, where as cherry shrimp and many of the Australian native caridina species thrive in my tanks. So as much as I love CRS, CBS, and their various varients I have to just watch them from a far and content myself with rilli shrimp and other colours of cherry I can keep.