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Originally Posted by dirtyreefer
Hmmm wonder why you're getting NO3 readings, that's not a good sign... Do you have a high sensitivity PO4 kit (Merck, Hach etc.)?
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.5 no3 isn't a problem,My no3 generaly tests around 5-10 ppm before w/c,so given that,Im still exporting alot more than Im importing with a water change.The first test I used untreated tap water to mix the salt,because I just mixed up a glassfull to get the test results.I thought at first that was the cause.But the second test after 24hrs was going into the tank,so it was filtered water.Now Im thinking maybe a dirty test tube,or something like that.No PO4 kit,the cheap ones dont work and the expencive ones cost around the same as a phos reactor.So I got the reactor and grow Chaeto.