YEs you can do this i had the same thing happen to mine on the 62 gal. My wife would say your tank is singing again . 
So i just took off the cap from the durso and stuck a small tupperware cup in there and drilled a hole in it and worked like a charm.
mike
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180 starfire front, LPS, millipora
Doesn't matter how much you have been reading until you take the plunge.
You don't know as much as you think.
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