Try everything you can throw at them. Hatch some cysts if that's your only option, but if you can buy live adult brineshimp they should work well.
Don't be surprised if they don't eat for over a week.
One extreme measure you can take, if you still don't get results after a week, would be to move your established cardinals into the QT, in order to them to teach the new arrivals what's on the local menu.
|