salinity by aquavitro mixing with rodi water

[Nano345]

Ok so I mixed up 15 gallons of salt using 7 cups of salt as directed. With the milwaukee refractometer it is reading 1.028

My calcium levels apx 480-490
alk 11.2

Just wondering if I should add more RODI water to get it to read 1.026

This is the part that confuses me down below, not sure how to take that info and plug it with my numbers to verify:


. Measure the salinity. We recommend a salinity of 35‰. This will be a temperature compensated SG (specific gravity) value of 1.026. If you are using uncorrected SG values (H) then the following formula will yield a value for S (salinity) accurate to within 1%:

S = [0.3348 * T] + [1325 * H] - 1330.4525 (calibrated at 15.56 °C (60 °F))

S = [0.2211 * T] + [1325 * H] - 1330.4525 (calibrated at 25 °C (77 °F))

where S is the salinity in parts per thousand; T is temperature in degrees centigrade (range of 13-30 °C); and H is the uncorrected hydrometer reading. If you don't mind an error on the order of ±3%, simply use the following table:

If the water temperature is: cal.@ 15.56 °C cal.@ 25 °C
degrees C degrees F then target H= then target H=
13 - 15 55 - 59 1.027 1.029
16 - 19 60 - 66 1.026 1.028
20 - 23 67 - 73 1.025 1.027
24 - 27 74 - 81 1.024 1.026
28 - 30 82 - 86 1.023 1.025

Any input on this would be great. TBH I am not all concern as it its 1.028 and my tank is low on salinity side so it should level out. However for future purposes want to make sure I understand whats going on and mixing right. This is my first time mixing salt into water.

After testing saltwater from local lfs reading at 1.022 I decided to make my own, to ensure that I am starting off with superior water and mixing it right. Let alone safe money.

Water looks clear and salt was added in slowly. I will do a 15 % water change tomorrow. I just did water change 5 days ago, but I wanted to add water that is stable and mixed right.

Thanks for the input!

 

[Cory]

Ok so I mixed up 15 gallons of salt using 7 cups of salt as directed. With the milwaukee refractometer it is reading 1.028

My calcium levels apx 480-490
alk 11.2

Just wondering if I should add more RODI water to get it to read 1.026

This is the part that confuses me down below, not sure how to take that info and plug it with my numbers to verify:


. Measure the salinity. We recommend a salinity of 35‰. This will be a temperature compensated SG (specific gravity) value of 1.026. If you are using uncorrected SG values (H) then the following formula will yield a value for S (salinity) accurate to within 1%:

S = [0.3348 * T] + [1325 * H] - 1330.4525 (calibrated at 15.56 °C (60 °F))

S = [0.2211 * T] + [1325 * H] - 1330.4525 (calibrated at 25 °C (77 °F))

where S is the salinity in parts per thousand; T is temperature in degrees centigrade (range of 13-30 °C); and H is the uncorrected hydrometer reading. If you don't mind an error on the order of ±3%, simply use the following table:

If the water temperature is: cal.@ 15.56 °C cal.@ 25 °C
degrees C degrees F then target H= then target H=
13 - 15 55 - 59 1.027 1.029
16 - 19 60 - 66 1.026 1.028
20 - 23 67 - 73 1.025 1.027
24 - 27 74 - 81 1.024 1.026
28 - 30 82 - 86 1.023 1.025

Any input on this would be great. TBH I am not all concern as it its 1.028 and my tank is low on salinity side so it should level out. However for future purposes want to make sure I understand whats going on and mixing right. This is my first time mixing salt into water.

After testing saltwater from local lfs reading at 1.022 I decided to make my own, to ensure that I am starting off with superior water and mixing it right. Let alone safe money.

Water looks clear and salt was added in slowly. I will do a 15 % water change tomorrow. I just did water change 5 days ago, but I wanted to add water that is stable and mixed right.

Thanks for the input!

What you want is 1.026. While 1.028 is fine for most if not all saltwater inhabitants most try to maintain 1.026 Sg.

The reason for that fancy talk is Science. A hydrometer is a floating device that is effected by temperature so it may read higher or lower depending on the temp. Since you dont use a hydrometer but refractometer you dont need to worry as its likely to use atc and compensates for temperature automatically. So your salt is 1.028.

Whats important here is that all parameters are in line. Calcium is higher than id like, same with alkalinity, so id be inclined to reduce the salinity to 1.026 to bring the alk and calcium down tl normal.