Sorry to hear about your problems I just recently started myself, I just have mine in a 10 gal w/ normal pebbles in the bottom, one rock cave that I had lying around and a sponge filter and mine have had their first set of babies... I keep the water around 75F, but other than that the tank was cycled (used to be a fish overflow tank) and I just used tap water w/ dechlorinator (we have hard water here in Fl). For shrimp I more agree with the set them and forget them side of it, I only feed mine like one time every 2 weeks and like a small part of an algae wafer to keep water healthy and so that they are hungry when I feed them so theres no left overs. Also: tank size for you shouldnt be a problem you are certainly not overstocked and plenty of people breed in smaller and what should be less favorable environments.
My advice, maybe if you have a fully cycled healthy fish tank do a complete water change of the RCS tank and use all water out of that tank and see if maybe that water since you dont mess with it as much is healthier? Or maybe you got a bad stock of RCS if thats possible, just throwing it out there.
My advice, maybe if you have a fully cycled healthy fish tank do a complete water change of the RCS tank and use all water out of that tank and see if maybe that water since you dont mess with it as much is healthier? Or maybe you got a bad stock of RCS if thats possible, just throwing it out there.