Well, I have a 75 gallon tank sitting in my garage waiting on the basement remodel that is going on 2 years to complete to get installed. But life has gotten in the way as usual
Nitrates are not as toxic as ammonia and nitrites. Fish and corals can tolerate higher nitrates than ideal.
I am kind of surprised that you don't have any algae. Which leads me to believe that your test kit might be bad. Do you have access to another one? Or take a sample to the LFS to...