Hi
@mcarroll , great questions and more than happy to answer.
RSCP salt is 12.2 dkH , but their core care programme (that I WAS following) stated 12.6dkH for max coral growth so I dosed Alk to achieve this.
whenever you have alk and Ca you get precipitation, Ca and CO3 love eachother, its only the chaperone Mg that gets in their way, add a little heat..... Mg not in as high proportion as the CO3 and Ca, add and little soft light and music ... they soon get together
My RODI water is always ready for me, at room temp... about 21 oC in a fairly well sealed clean still container, so little gas exchange. I've never measured my freshly made salt mix pH, but it would rise once within the tank due to aeration from movement and skimmer. My ph is always 8.35 day (max at 7pm) and 8.26 at Night (low at 7pm).
Precipitation was mainly on heater and pump internals, and at the water line of the tank. I had some white dust power within my substrate that I would syphon out, not sure if that was precipitation or general detritus.
I've never had mass-precipitation, where the water is cloudy.
In following the RSRCP, as well as using their salt, and parts A, B and C (Ca, Alk, Mg) dosing, I dosed NOPOX (carbon) and their Reef energy A and B. All of this allowed me to get a stable system, Nitrates 0.2, Phosphates 0.015. I found over time, that as my tank progressed, I could do away with the NOPOX as nutrient exess was taken up by weekly 6% water changes, chaeto in refugium, coral growth.
As stated above I use 3 part, never tried a Ca reactor, with only a 250L DT the additives needed are relatively small. My tank consumes 10ppm Ca a day and 0.7 dkH a day.
I've never seen a salt mix that wasn't intensely hygroscopic.
Doesn't the salt clump like crazy in those paper bags? If not how do you keep the humidity out?
The salt is in paper bags for that reason, to absorb any moisture... but more importantly I place the bags back in the original salt bucket and close the lid, to its really at the same conditions as when I buy it. I have never found it to clump etc whatsoever..... to use the salt, i just tear off a small corner of the paper bag so the salt flows into my water mixing container, directly onto the 1000L / hour pumps I have running in their (along with a 50watt heater). The salt mixes completely and is at temp in an hour... its only 15L so not much to mix. I know its ready when the SG is 1.026.