Chris,
If you can't get them out easily it is best to send the pumps in, usually the stuck parts will be destroyed in the removal process and you will need new ones. They typically have to be drilled out in these cases, but sometimes I can extract them with a dent puller (slide hammer), but they still are ruined.
__________________
Roger Vitko
Tunze USA
"He's for every one of us, stands for every one of us, he'll save every man, woman and child in a mighty Flash!"
Current Tank Info: 210 gallon planted tank with Altum Angelfish
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