Today I have noticed a lot more baby shrimp. It looks like both types of shrimp are breeding, with really tiny ones which look newly hatched again. I counted about 20 babies today, which I imagine a lot more are amongst the foliage that I can't see. - I think I may end up with a lot more shrimp in the next couple of months!
They must really love all the hiding places to breed! - this is really rewarding!