It depends on your ferts. If you know your fertilizers are not building up, then smaller amounts would be ok. IF you do not test or do not know how much fertilizer is in your tank at water change time, I woulds say a 50%+ would be in order weekly.
Standard 10 Gallon (20 x12x12).
Low tech, Sand substrate.
Eheim 2211, and Aqueon Quietflow 10.
Finnex Stingray LED, 20" above substrate
2 Anubias Nana Petite, Christmas moss.
4 Halequin Rasborahs, 5 RCS.