What range is suggested as a good starting point for partial water changes on a mature, properly sized boxfish tank?
Answer
10% to 20% of the tank volume weekly or bi-weekly.
Regular partial water changes are vital due to the fish's sensitivity to fluctuations; a schedule of changing 10% to 20% of the tank volume weekly or bi-weekly is suggested.

#Videos
Do you really want a Boxfish? (Ostracion cubicus) - YouTube
Related Questions
What is the immediate danger associated with stressing a boxfish in a closed aquarium system?What is the frequently recommended minimum tank size for housing a single Yellow Boxfish specimen long-term?What specialized dietary classification do boxfish often fall under in their natural habitat?What type of water flow is generally recommended for a boxfish environment?What is a crucial step to avoid when handling a boxfish to prevent toxin release?Why is treating common marine ailments in boxfish notoriously complicated?What range is suggested as a good starting point for partial water changes on a mature, properly sized boxfish tank?What level should nitrates ideally be kept below for sensitive species like boxfish?Which fish types are generally advised against keeping with slow-moving boxfish due to harassment risk?How does the coloration of the Yellow Boxfish (*Ostracion cubicus*) change as it matures?