gone fishin
New member
That doesn't make sense to me (To top of with Salt Water).
When water evaporates from a tank, it raises salinity, since water get more concentrated. (Less any salt creep) That is why you always top off with RO water (0.000 Salinity).
If you top of with Salt water, salinity will raise constantly. In my case, I roughly top off 5 Gals a week. That would raise salinity too much, if I kept top off salt water always.
I do sometimes top off with Salt water when my skimmer is very wet skimming, but that is replacement water, not evaporated water.
That top off calculator that VHAUNG168 provided proves that fact that topping off with salt water will raise your salinity. (Exactly the calculator I was looking for). Helps with guessing. (THANKS!!)
I should have been more clear. I top off with saltwater if I am trying to bring up my salinity.