I've not presently changed any water in 13 weeks a full on reef with fish , SPS
I currently dose
Tropic marin A B C balling
Reef flower F + B colour
Tropic marin K
+ (trace elements)
Tropic marin A - (trace elements)
All dosed via a 7 channel dosing system so fully automated and all trickled over a 24 hour period daily to help with stability that enables me to replace all the main elements as well as trace elements.
Yes you can get away with doing no water changes but will cost you a fair bit in equipment and a good understanding of water chemistry is needed to do it properly in my opinion.
I also run pellet reactor , ozone , UV
, Large deltec skimmer , large cheato algae bed which all helps keeps things low