joachimp wrote:There seem to be 3 distinct sizes of RCS babies, so I'm assuming three clutches? Is there a very much variability in fry size?
congrats on your babies! That is certainly fast, 1 week for your population to increase by 10x? As far as I've seen, shrimplets are all fairly identical in size. RCS babies grow very quickly, and can double their size in a few days, from 3 mm at hatching to 6 mm within a week. So most likely it was multiple cluthces.
That pic of the male in the sunlight is very pretty!
I would recommend doing more water changes than that. 10% per month is very, very low. Even with plants, you should do at least 25%
per week. Not only will that benefit your shrimp which are very sensitive to water quality, but your fish will appreciate it as well. Plants can not remove the pheromones and hormonal wastes that animals produce. Besides that though, NO3 at ~20 ppm can be deadly to shrimp.
Is there a turtle in that same tank? If so, they are VERY messy and I personally wouldn't keep them with fish or shrimp because they'll be eaten if they're not killed by polluted water first.