Eliminating water changes via dosing?

Has anyone been able to eliminate or substantially reduce water changes?

I have sps tank and all of my parameters are controlled except for trace elements which i cant test for. (Tried salifert strontium kit very complicated)

Does anyone know of a product out there that might work on sps tank?

Im think really low dosing of whatever might work. Obviously it would be great to test for all of the trace elements but that isnt going to work.