So I have a 40 breeder. Has a few coral, added a 10g sump to it about a month ago. Right now my nitrates are at 0 and phosphate at 0.2, if I feed like crazy I can get it up but I already feed much more than the recommended for my 4 fish lol. I really do feed a lot, I have a undersized skimmer (tunze 9001). Should I add another small fish or 2?