SPS are iffy to dip. Some SPS like Monti's generally can't take a FW dip. Some acros seem to survice a very brief FW dip.
Clams also can be dipped. FW dips are used when clams show the "pinched mantle" syndrom. I've done it before on my clam. Its scary as heck, but they do survive. The dip was about 15 minutes or so.
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32"x32"x20" Cube-ish tank
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