You can do 30% water changes every day and your livestock will love it. All the essential elements are in the new salt mix. Between that, light and food the livestock get everything they need. The only stuff that remains in the water column is the bad stuff (nitrates, phosphates, etc.) that is removed by a pwc
You don;t want to do a water change 30 minutes after feeding, but once the food is eaten, removing leftovers with a pwc
can only help the tank.
The only real problem with too many pwc
's is the cost of the salt.