Dead fish in tank..Good or bad

[bluetang]

In the last two days I've lost a Six Line Wrasse and a Blue/Green Chromis. They disapeared into the rocks, never to come out. I tested the water to find it is fine.
Today, the tank is doing some funny stuff. GSP's are not open, Open brains have tenticles out all day, feeding.
The fish were fairly small so I didnt think the Bio load from the fish would be a huge deal. The tank is a 125g with a total water volume of about 160g. Should I go fishing for them or let it go another day or two?
I suppose by tomorrow, with the clean up crew I have, there wont be any sight of a fish at all.