Knowing what ranges are acceptable and what swings are acceptable is part of why keeping these charts is such a good idea! Glad to have helped. Try not to sweat the small stuff, or the gradual changes. Its swings you want to be leery of.
Also.....
Bertoni brings up a good point I was going to mention.
Having TDS in your tank /is okay/ so long as you know WHAT the solid is. Total Dissolved Solids will always be in your tank; that is what your salt mix is!
The reason people tell you to use RODI water is that it removes all the TDS from your supply. The stuff we don't know what it is. It could be copper... or it could be harmless. But because we don't know, we don't want it.
However, once it has been purified don't fret yourself too much. If the bucket read 0 TDS and you put in your salt mix (or kalkwasser into your auto-top off, or whatever) having the TDS rise is perfectly okay because you know exactly what all that TDS is.
Its the unknown parts we worry about. So putting a little prime in to help protect your inverts/corals won't hurt.
