Pygmy Hawks in my experince are hard to keep. They are very sensitive to water quality and that can be more difficult to balance in a nano tank vs. a bigger tank. Smaller water volume means when things go bad, they go bad in a hurry.
Gobies are great fish and there are several smaller species that are perfect for nano tanks. Be careful in your selection though because some - like Panda and sand sifting Gobies - have specific needs. Pandas for example need a at least one pocillipora in the tank and sifters need live sand with pods to feed on in addition to the usual frozen meaty foods.
Thanks and thank you everyone for the input!
I am likely going to get a tailspot blenny (favorite fish) and probably a goby/pistol pair vs. clown.
I had a yasha haze goby/pistol pair which was cool but the yasha haze was always super shy so going to look for a different type of goby.



