hey all,I am having a prob with nitrates,they rose to about 40(using the API and RED SEA test kits)and I cannot get them down.I would like to add a couple corals and a anenome but my trates are too high.Ill state my start setup and the changes I have done.75 gal with 80 lbs live sand and 50 lbs LR,rena xp 3 canister w/2 30 ppm and 2 20 ppm filters(bottom),rena bio stars and ceramic 8 pcs of each(middle)rena bio chem zorb packet and a micron filter(top),sea clone 100 skimmer(not the best but its a skimmer),7 g fudge w/10lbs live sand,10 LR,and some chaeto (pump in gravity out),3 chromas 2 damsels,RO water 1.023 sal..started july 6th and all was well,went thru am spike,nitrite spike followed closly by nitrate spike in early sept.let tank cycle till dec 10th with readings at 0 except nitrates were at 2(friend has a electronic tester),added bicolor blenny,firefish,5 snales,10 blue leg crabs,and 3 peppermint shrimp.let cycle till late jan,same readings.on march 2nd added a scopus tang,2 clowns,2 paj cardinals,readings stayed good till apr 10th and trates were at 5 then increased to 40 over the weeks till mid may.here is what I have done with advice from LFS.8 gal change ro water every week(4 changes),replaced the stars and ceramics in filter with live rock,removed 1 20 and 30ppm filter pad,cut filter flow to half,vaced sand (half late may other half june 20th),added more carbon to filter,added 25 lbs LR.All that and tates did not drop at all,my fish inch total right now is 16 inches,did I move too fast or something,I was also told to carbon the hech out of it...sorry about ramblin but any advice would help greatly and thanks.