I have a 180g FO
and a 90g reef. The 180g has been up about a year. It's a semi-aggressive tank. LFS
told me I didn't need a skimmer on a FO
. I was doing water changes every 3 weeks (per his direction) and hitting 100 ppm
on nitrates between changes. Also had cloudiness issues. Switched to a different lfs
(who I ended up buying the 90g reef from a month ago) and they recommended a skimmer. Now I'm seeing 15 ppm
nitrates between changes. And the 90g has had 0 ppm
since I started it. So, I guess I've become a big fan of skimmers. I have also come to understand that the cleaner the tank, the less that gets skimmed (which makes perfect sense).