[Cougra]

How long have you had the fish? If you just got them then I would say they are still really stressed out. I would leave the water alone for a while and let the clownfish settle in before doing any major changes. It could be that your water chemistry was very different from the stores water chemistry and they need the time to adjust.

In the mean time, try to get some live adult brine shrimp to feed them. Perhaps the live food will intice them unlike dead food since it's more natural and they know what it is. If you can't get live brine then try hatching some brine shrimp (it's fairly easy to do) and feed the newly hatched ones (should only take a day or two to hatch them).

Keep offering them some of the frozen foods like you have been doing.

Do you have any other fish in the tank? Sometimes if new fish see other fish eating what you've offered they'll learn to try it as well but it might take a couple days yet.

If you've had them for a while did you notice anything odd in the tank recently? Have you changed anything up like the aquascaping or the food types?