Hello! As the forum says, I’m new to the saltwater hobby. I’ve been cycling my tank for 23 days now. The light has been on all the time except for today that I turned it on for a few hours. The Ammonium (NH4) has been constantly at 0 I do a test every three days give or take. Same with the NO2, but it’s reading at 0.2. The tank is a 75 L (20 gallon) cube. I do knot have a skimmer my local store gave me some bacteria treatments instead and with that it takes the need of a skimmer all together. The rock is a fake rock and a week ago I added live rock fragments to start colonizing the fake rock. And the sand was live sand. I was told I need to wait for an ammonium peak at one point yet I still haven’t seen it? Perhaps I screwed up the cycling process?? Or am I on the right path? And if so how long to wait to maybe add a small clown fish o a hardy snail/invertebrate? Also what is with cycling without light? I’ve been told by many people to leave it on and others off. Here are a few photos of the tank and the NO2 test.