salinity issue

[George]

Dosing 2 parts in high concentration can and will increase salinity. part 1 has about 37,000 ppm calcium (calcium chloride) and part 2 has about 5,300 dkH alkalinity (sodium bicarbonate) per RHF recipe 1. Chloride and sodium are major parts of sea salts as the following image shows.
I think you over dose both parts. Per Randy, he suggests starting dosage of 1mL/gallon of each part in a heavy demand (SPS dominated) tank. Try to dose at 0.5mL/g and slowly increase from there. Measure calcium and alkalinity along the way.

[spawn]

[quote=George;636797]Dosing 2 parts in high concentration can and will increase salinity. part 1 has about 37,000 ppm calcium (calcium chloride) and part 2 has about 5,300 dkH alkalinity (sodium bicarbonate) per RHF recipe 1. Chloride and sodium are major parts of sea salts as the following image shows.
I think you over dose both parts. Per Randy, he suggests starting dosage of 1mL/gallon of each part in a heavy demand (SPS dominated) tank. Try to dose at 0.5mL/g and slowly increase from there. Measure calcium and alkalinity along the way.]


I feel that i am over dosing too, but only in relation to the amount of fresh water that is being added by the ATO, I think the amounts of the 2 part are off setting the amount that the ATO would add if less of the two part were used. But these amounts have seemed to have been accurate to maintain levels of 420 & 7.5 which are what I aim for, as the system is ulns.
Is it worth the risk to knockback the dosed level of CA to match the level of Alk dosed correct the level of CA in the tank water & see what happens? In order to do this I would also have to do at least a 20% WC prior to correcting the levels in order to drop the salinity. Those are gonna be some pretty big swings, & then I personally feel the Ca is likely to take a dive.