Arg, computers. I typed this all, and it got erased three times! Annoying. Here goes again...
Just curious, what are cap clowns? Never heard that common name before. Anyway, as for taking eggs away from the parents, there are upsides and downsides. Downsides, clowns are great parents. The female will guard the nest, and the male will clean each egg with his mouth and fan them with his fins. So, that's all good. Also, taking the eggs away, I've heard, can really piss them off! But they'll get over it. Upsides to taking them out, there's a good chance that the eggs and/or larvae will be eaten by another fish or invert. Also, the larvae can easily get sucked into filters, as can the live rotifers that they need to be fed for the first 5-9 days. After that, they will eat live brine shrimp. So, given all that, maybe you can compromise. Figure out when you think they're going to hatch. Turn off the lights and all the filters and water movement. Shine a bright flashlight down through the surface of the water, which will attract the larvae. Take them out at that point and put them in a small tank where you can control their environment without bothering the rest of your showtank. That's my advice. Of course, keeping the rotifers and brine shrimp alive to feed is another project alone! They both need phytoplankton to eat. So, that's the best advise I can give you. There are two books that I've learned this from, so I'll give you those titles in case you want to read more about it all. I think everyone who has an anemone/clown tank should have the first one...
Anemonefishes and their Host Sea Anemones by Daphne Fautin and Gerald Allen
Clownfishes by Joyce D. Wilkerson
If you want me to, I can look some stuff up if you have specific questions. That way you can save some money!

Let me know. You can email me too, if you want.
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Sara