This is my first tank. It is a 55 gallon i have 5 danios, 4 java ferns, some wisteria, 3 anubias and some java moss. 75 Degrees, 0 ammonia, 0 nitrite, 0 nitrate. I used tetra safe start ten days ago (i know this is frowned upon now). My nitrites just hit zero today. My question is should i be worried that i am showing no nitrates?