I am in a very hard debate. I am wondering if i should get a skimz kone sk181 and put in in the refugium section of my aqueon model 2 sump. There is not enough room in my return pump chamber to hold the skimmer and my rio+2100 return pump. I was thinking of getting a little hang on back refugium such as the finnex external refugium from amazon. This way my skimmer comes first and my refugium overflows into the aquarium via return pump. Any thoughts? If it was you would you put the skimmer first or the refugium? My tank is a 75 gal aqueon tank and Im in trouble with extremely high nitrates and I cant bring them down. huge water changes all most every two days and still it wont budge. Any ideas are greatly appreciated


