Spelling mistakes etc in It I’ll. Sort out later.
Re softy tank not needing dosing. I’ll agree to disagree unless you keep it completely sterile. A year from when you set it up all compounds will be depleted, coraline alone will deplete it, before you even get onto other organisms that use it.
It is chemically impossible to maintain these parameters from just water changes. You physically cannot add what is used back by using the same salt water mix the tank was set up with.
Anyhow, post was made to help people who pmed me for a guide, not going to get into an argument about what does and doesn’t need dosing.