Well I've had goldfish live for yrs and yrs in water at that temp, and mine are obviously healthy so, meh. I'm not particularly attached to them, they don't have names incase they get eaten. Anyways. Both clearmax and matrix help w/ the nitrates. I heard so many different things about the matrix, someone even said it killed their fish! But after hrs of research, only one person said that, leading me to believe it was not the matrix. But lots of people said it works to help remove nitrites, nitrates and ammonia. Others said it can't help, but never tried it for themselves, so can't really take their advice. But I got it for the ammonia and nitrate removal. The 2 things I need most 
As time goes on, contrary to the naysayers, it seems to be working(been testing every 2 days). Here's some links to some of the stuff I use:
Seachem Matrix: http://www.seachem.com/Products/product_pages/Matrix.html
Clearmax: http://www.partsandmedia.com/a1348.html
Zero-carb:http://www.partsandmedia.com/a1493.html
As time goes on, contrary to the naysayers, it seems to be working(been testing every 2 days). Here's some links to some of the stuff I use:Seachem Matrix: http://www.seachem.com/Products/product_pages/Matrix.html
Clearmax: http://www.partsandmedia.com/a1348.html
Zero-carb:http://www.partsandmedia.com/a1493.html
Which makes me happy
Think about how many people fell in love w/ fish thanks to the boring ole' feeder goldfish. They might be common, and really cheap, but they're still fun little fish. Goldfish may not be the sharpest cookie in the drawer, but it's part of their appeal. My first fish happened to be a pleco, named mr plecostumus(dad named him). But later, we added a fan-tailed goldfish, named willy(after keiko). I was like 2 when mr p came along, so I couldn't care for him. But boy was I excited when I got to feed my retarted little goldfish! Everyone ended up dying one waterchange day, unknown chlorine spike. That very same day, I learned that when you flush ur fish, it sends them to fish heaven. So many life lessons thanks to the boring old goldfish
cichlids are pretty kick ***
