Water changes are over-rated.
I recommend keeping a close eye on Alk, & Ca, and only occasional checking of Mg and I(Iodine/Iodide).
Add inexpensive homemade supplements as needed and do just 10% monthly water changes.
Food provides most of the trace elements but watch carefully to avoid overfeeding.
Keep a close eye on algae growth, adding more snails as necessary to keep nuisance algae in check.
Let the biofiltration grow, even to the point of the tank being a little "dirty" or overgrown in places because this is the way Mother Nature does her biofiltration with LS, LR, Algae and LW.