Dosers and when to start using them

[Neptune1707]

I currently have a 92g acrylic FOWLER tank. Will be moving to new house soon, as soon as new construction is done. Getting an upgrade on fish tank to Red Sea S-500 tank (135g). I just ordered a Spectra Pure RO/DI unit to fill all 135g with pure water once I mix it with salt. My goal is to start keeping SPS and LPS coral. If I'm using a quality salt mix, with regular bi-weekly water changes when will I need to start using a doser to maintain levels for my SPS/LPS. I assume a lot of it will vary on size of specimens and how many specimens I have in the tank. I'm guessing the simple answer here is "test kits" to see what all my levels are. I was just curious if anyone starts dosing on day 1 or you wait until coral frags start getting big enough to need supplements via doser.

 

[Randy Holmes-Farley Verified Community Expert]

You won't need to dose anything on day 1.

Wait until you have enough demand for alkalinity to be dropping below your target to begin dosing anything.