As a relatively new koi keeper, I initially read that keeping salt levels at 200+ ppm was good for the fish. Then last year I saw that plants didn’t grow so well at that salt level. Just recently, I read that salt levels should ideally be at 100 ppm but I’m struggling to get mine below 170 ppm because of all the baking soda I’m having to add due to our super soft city water. What salt levels are acceptable, or even ideal? Getting a definitive answer about salt levels will help me triangulate my water softness issue (earlier post). Thanks!