First thing is you notice I fixed that caps key.
The tank is a 75 gal. reef, nitrates seem to stay arond 10-20 I cant seem to get them to zero out? Doing 5 gal. water changes every two weeks ammonia is 0, ph is 8.2, nitrites 0, salinity 1.023.
I have a sea-clone hang on skimmer and (3) power...