I would normally say don’t rinse the sand. You really don’t need to because it will become clear as you siphon and stir it…
BUT your tank is pretty small and brand new. Rinsing your sand can be pretty beneficial because you are going to have crystal clear sand when you stir it in the future.
90% of people don’t rinse their live sand. You technically aren’t supposed to and I didn’t and I added 300 pounds of it. But if you have the time, go for it.
honestly, with siphoning you sandbed with water changes, it will be clear without needing to manually rinse. It all depends on how much effort you want to put in. Not rinsing and rinsing will give you the same end result.
For the people that say tap kills bacteria…I don’t think so. First, unless you are buying ocean direct sand, this sand was already dried and sifted from the ocean. The company manually adds a dormant bacteria which is not the same bacteria that you will later develop.
And tap doesn’t kill bacteria regardless. If so, we would wash our hands with tap and not use soap. Also, I dipped my rocks in bleach and left them to dry for a week and they were STILL alive! I found a Xenia coral growing on it and I didn’t add any Xenia.
All in all, I wouldn’t waste my time, but being that your tank is so small and manageable, it wouldn’t hurt if you want immediate results.