How much is too much ?? Dosing limit per day?

[Jonathan blackwood]

My calcium and magnesium is on the lower side , and I want to raise it obviously. .. but how fast or how much can I dose per day?

 

[Downbeach]

You can raise your Ca by 50ppm per day, your Alk by 1.4dKH per day, and your Mg by 100ppm per day. BUT, the first thing I would d0, is to make sure your SG is accurate since this is where you're adding those elements in the first place. I would use a properly calibrated device, i.e. refractometer calibrated with a 35ppt solution(not water), get your SG up to 1.026 and check your numbers in the freshly made SW.

 

[BlueDevil]

Also, raise your Mg first to the correct level. Then Alk and Ca. Without a correct Mg level you won't be able to balance Alk and Ca.

 

[Salty1962]

Check out the calculator @ BRS. Good starting point.

 

[Randy Holmes-Farley Verified Community Expert]

What are the values now?

 

[Jonathan blackwood]

What are the values now?

CA -360ppm
MAG- 1000ppm
ALK-8.4

 

[BlueDevil]

CA -360ppm
MAG- 1000ppm
ALK-8.4

I would raise you Mg first to ~1350. That should take 4 days with 100 ppm per day. Once that level is reached you can raise your Alk and Ca. Your Alk is not terribly low but Ca could be bumped up a little.

Also if you haven't already read this definitely do. It will answer all your questions. Written by Randy himself[emoji4]

http://reefkeeping.com/issues/2004-05/rhf/

 

[Downbeach]

CA -360ppm
MAG- 1000ppm
ALK-8.4

What salt mix are you using? Where do you keep your SG? Are you sure of its accuracy? I'm always suspicious of a low SG when I see an Mg reading that low. This is usually due to an mis/uncalibrated measuring device giving you a false reading, causing you to add too little salt mix, and by extension too little Ca, Mg and Alk when you make up your WC water. Even the most basic of salt mixes, i.e. plain IO, Red Sea, etc. will have a Mg of ~1300ppm at an accurate SG reading of 1.026(35ppt).

 

[Jonathan blackwood]

Mag-1200
Alk-8.7
Cal-450
No2-0.2
No3-2.0
Salt-0.23
Ph-8.0

 

[Randy Holmes-Farley Verified Community Expert]

If you raise the salinity to 35 ppt (sg = 1.0264), they will all rise, mag from 1200 to 1377 ppm.

 

[Jonathan blackwood]

If you raise the salinity to 35 ppt (sg = 1.0264), they will all rise, mag from 1200 to 1377 ppm.

Will be raising salt starting today thank you ! And one quick question randy, one two of my acros are loosing color and one turned brown. .. no tissue loss. Just randomly happened. Coincidentally after I dosed one time of peroxide. Not sure if that was the case, but any ideas off my parameters? ? All other corals are fine

 

[Randy Holmes-Farley Verified Community Expert]

Brown may be from elevated zooxanthellae (which are golden brown), and the hydrogen peroxide may have killed organisms (such as bacteria) which boosted nutrients that zooxanthellae consume.