[sgallagher7]

I have been fighting high nitrates and algae blooms over the past 6 months (since the tank has been set up). All of my parameters appear to be fine accept nitrates.

Ph 8.2
Temp 80
Sal. 1.027
Nitrite 0
Nitrate 50
Phosphate 0
Magnesium 1150
Calcium 440
Alk 4.90
Ammonia 0

I have chaeto in the fuge, Use excellent ro/do water, do 17% water changes weekly. I dont have any fish ( on 2 seperate occasions they died after 4 days). I just scrubbed 2 rocks yesterday of bubble algae, and other macro. I occasionally feed my coral some cyclopeeze. Im lost at this time. Iv tried everything over the past six months. Could it be my skimmer? Im running a euroreef-80 on a 75 gal tank with 30 gal sump (actual water volume is 68 gallons). Any help would be greatly appreciated.