actually, from what i gathered through internet, fluval says problem comes when :
filter is clogged, but mine is a new set up...
filter media too packed, could be.. i shall try reducing some tomorrow.
air stone placed near, no air stone in tank.
yea, theres auto purge, but filter is not yet 24 hours.. but i did on and off repeately and it keep purging out air but still blow lots of micro bubbles.. driving me crazy liao.. i shall oil the O-ring tomorrow, clean everything again and reduce media. if this is not working, im giving fluval a call..
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