Usually when nitrates are 0 it means the tank is not cycled as you stated, but during cycling your tank nitrates are useless let say. You look at only ammonia and nitrite. What is the No. for ammonia results?After changing out 15 gallons yesterday the tank is currently
I have the kind of goldfish they give you at the carnival.
And please do as T the loach says. The carnival goldfish get too huge for even for a 36 gal. tank..