Add a filter or change more water (get a bigger tank
) It is water quality in the end, and if you had big fish which needed a bigger tank, of course, and you do not.
When it is stable, plants help with the job of cleaning the water too, and you watch the parameters. You may find low Ammonia, Nitrite and Nitrate.
Those fish are all pretty small and with weekly care you are fine and likely fine if you were having a stable matured tank/filter with plants. Call me crazy. But it is just dependent with your tank and how it is running.
If you had long trips away from home, a visitor who doesn't know fish to care for them and no one changing water, then no, not a good idea.
According to AqAdvisor.com , which is a conservative tank estimator, you are stocked well as you are. With a 1/3 or so pwc per week. (I just guessed at a filter option) Also depending upon which filter you use. An AquaClear hang on the back/ HOB is adjustable flow and a 50 would work or a 30.
It is your tank and you make it like you want and are comfortable with. Merely suggestions.