3 months into Zeovit still detect PO4 & NO3

[Bluetang]

More than 3 months into Zeovit and dose 0.5ml of Zeostart everyday but still can detect PO4 and NO3. NO3 is about 10! Tested my source water it shows "0" for both NO3 and PO4. Thought that CR is giving out PO4 and NO3 have since turned it off almost 2 weeks but they don't go down? What other possiblities that I should check such as live rock? pls advise.

txs

[G.Alexander]

Hi Bluetang, please post some information about your system:

http://www.zeovit.com/forums/showthread.php?t=14

Please tell us also how long your tank is running.

Thanks, G.Alexander