<a href=showthread.php?s=&postid=14893719#post14893719 target=_blank>Originally posted</a> by sjm817
Tunze feels that it is OK.
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<a href=showthread.php?s=&postid=14891901#post14891901 target=_blank>Originally posted</a> by GrayJ
My skimmer ouput in my sump is putting microbubbles into my tank. I put a 100 micron mesh sock over it and it really helped. Will this hurt anything?