Chances are, no, they aren't laying eggs yet. They need to feel completely safe in the tank before they will breed. Also, they aren't near breeder size yet. But, from what I've read, tank raised clowns will easily host just about anything (Flower Pots, PVC, to a BTA). Wild ones will feel much more comfortable in a nem. Also, I've read that the temp needs to be a little higher (Can't remember where I read it, and I could possibly be wrong!) for them to start breeding. Also, something about lighting, just can't remember! Look it up online, theres tons of facts on clown breeding. If, by some bizarre chance they are actually breeding..... well, you've no idea how difficult it actually is to raise the fry. Do research on it, and you'll see what I mean. Constant supply of Rotifers/Baby Brine shrimp (0-2 days old).