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chinatown

Advanced Reefer
Location
Queens
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I have a mixed reef. Thinking about converting it to SPS dominant. What are the ideal Alk , Mag and Ca levels to maintain?
 

OzoneParkGuy

Advanced Reefer
Location
Ozone Park
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Alk: Range 7-11 depends on your tanks need
Cal: Salifert test kits state 425 in a natural environment. Range 425-480 again depends on your tanks need.
Mag Range: Salifert states 1300-1500 in natural environent. Range again depends on your tanks need.
With that.. you may also have low PH or Slightly higher PH. Depends on your tank.
Make sure your Mag levels are straight 1st before you try and raise or lower anything.
Then work on the correct dosing regimine for your tank. I find the best way to do that is by using dosing pumps. Congrats on your decision... it's alot more challenging.
 

Boomer

Bomb Technician (EOD)
Vendor
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The levels Warren gave is a nice target range.

Std NSW and most reefs, although not all, are

35 ppt
410 ppm Ca++
1290 ppm Mg ++
Alk 2.25 meq / l
pH ~ 8.2

A view of ocean Salinity, where when following the Law Of Equal Proportions

1 ppt = 11.7 ppm Ca++ and 36.85 ppm Ca++

So if shooting for a Salinity of 33ppt

33 x 11.7 = 386 ppm Ca++
33 x 36.85 = 1215 ppm Ca++

3166-004-C7D7CE8B.gif
 

Boomer

Bomb Technician (EOD)
Vendor
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Just a note. A Coal reefs pH can fluctuate as much as 0.25 pH units in 24 hrs and temp 2 C in 24 hrs. Salinty is much more seasonal. However, coral reefs are not reef tanks and stability is a better working theory.
 

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