I have 2 established and planted 10 gallon tanks that consistently test at 0 nitrates every week before I get ready to my 50% wc. My tap water has 5 ppm of nitrates in it by itself. There is a betta in each tank. Now, I do use seachem's nitrogen supplement because I was worried there was not enough for the plants.
How often and how much water would you change if these were your tanks?
How often and how much water would you change if these were your tanks?