eurofil sump

[cxr133]

i have a eurofil sump and i removed the filter sock because i read on here what nitrate magnets they are. anhd i have been having nitrate problems (>100) for the past month.

i had to put in PVC pipe where the water entered the sump and now flowing out of the PVC along w/ the water are lots of air bubbles....

are these ok?
what can i do to limit amount of air?

http://img60.imageshack.us/img60/8586/dsc028203zw.jpg

thanks in advanbce

[kau_cinta_ku]

filter socks are great to have in the tank but you just have to rinse them out evry other day or so to keep them from building up nitrates

[cxr133]

TTT.....

will it help to drill holes into the ends of the PVC pipes to stop the sandblasting type effect??

and to reduce the number of air bubbles???