A journal is one thread you keep adding to as the tank grows in, rather than a new post each time. That is what makes them worth reading: a beginner can scroll one thread and watch a tank go from bare substrate to grown-in, including the parts nobody photographs. A good journal tends to have: The setup, written down once — tank, light, filter, substrate, stocking — so later posts do not have to repeat it. Dates . "Week 3" means much more than "a while back". The bad weeks. The diatom phase, the melt, the algae, the rescape you were not happy with. These are the most useful posts in any journal and the ones people leave out. For photographs: turn off the room lights, clean the glass, shoot straight on rather than at an angle, and wait for the fish rather than chasing them. Phone photos are completely fine — nobody here is judging the camera. One house rule, and it is the only one that matters: answer the question that was asked, and say when you are not sure. A confident wrong answer costs somebody a fish.