Quote:
Originally Posted by Reefie
Another thing you can try:
Cut the top off a 2l clear soda bottle and drill a bunch of small holes in it so water can flow but fish cant get to the clam. Place it over the clam and see what happens.
It may help you determine if indeed it's a nipping problem that you have.
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i think i've solved the problem. both clams have fully opened and neither of them is gaping.