this might be a dumb question, but what is a fuge? i've heard a lot of talk about them, but i have no idea what it is. i bought a 29 gal set up off of craigslist about 3 months ago. it came fully stocked with live sand, live rock, soft corals, and fish. my nitrates have been around 80 since i got it. i can't seem to bring those levels down. i do a regular 25% water change about every 5-7 days yet the levels stay the same. my livestock seem fine, everything appears to be growing, but every where i read online says you should have lower nitrates. i finally bought a protien skimmer (lee brand) last month and i clean that out regular as well. what do i need to do? is it ok to have a nitrate level of 80?