First of all Scott said:
Quote:
it is MUCH better to UNDERfeed than to OVERfeed... just to clarify.
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Thats so wrong its almost funny. Its not better to starve your fish.
Secondly, WOW

I've never seen that many bubbles outside of my kitchen sink! If you are feeling adventurous you could get yourself about three or four buckets of RO ready, and take a Saturday afternoon to scrub them outside of your tank. If you scrub in one bucket, rinse in the next and so on you'll give yourself and your crabs a head start on it.
Did you pop many of those bubbles when you first started to see them in your tank? Thats a sure fire way to spread them.