[scoop]

Not sure what you mean by 'puffed up'? Can you post a picture? They don't like direct flow, but if it is too much they will usually close, not open more.

 

[scoop]

It might just be responding to the food? wait another day and see what happens. Keep on eye on it because if the flow is too much it will recede and could cause damage. I always target feed my frogspawn w/ a turkey baster once a week and they grow like weeds.