Hi there, I'm a newbie. my 12 gal tank was done cycling and I have 6 glofish tetras and 3 ghost shrimps for a wk. Api test kit is used. N1 7.6, n2 0, n3 0, n4 10. Temp 78. Java fern, water wisteria, Anubias, water lily with gravel. Api water conditioner is used (.25 mL for 5 gal). After I...