I had the same results with the old test kit, new test kit is only two weeks old.
This week I actually tested my ro/di water and tested it again after mixing my salt for 24 hours for doing the w/c on my display last night. Both read 0.
I just tested phosphate in the cooking tub to be zero with a hagen and api test kit.
What I don't understand is that if there is organic matter being turned into nitrate, should the rock not be spitting out detrius?
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72g bowfront, t5.
29g JBJ nano cube, ATI 26HD.
Livestock: clown fish, chromis, coral beauty.
Corals: Toadstool, maze brain, candy cane, mushrooms (purple & green hairy), button polyps, green zoas, GSP.
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