Dropping alk with Calcium precipitation?
- Thread starter Icefire
- Start date
No that should not be problem. Just remember when the Alk drops it is taking Ca++ with it, which I think you know, which is going to be the solid CaCO3 and lower the Ca++. That water may be cloudy or form a chalk on the bottom if done to much. That drop, from 15 - 5 -7 dKH, will equal a drop in Ca++ by ~70 ppm. Some of it may be Mg++ also
It should but it does not mean it will. There are many factors that effect it, i.e., Temp, pH, Alk, Ca++, Mg ++ etc. Normally, if Ca++ leaves solution abioticly, which is what you are trying to do, a drop in 2.8 dKH will take with it 20 ppm Ca++ to make CaCO3 Calcite solid.
A old method for lowering the Alk is to add Ca++ and an old method for lowering the Ca++ its to add Alk. By far the more common is to lower the Ca++ by increasing the Alk. Randy talks about this in his article on Ca++ and Alk balance. Lowering the Alk is not all that safe as the other. I should have mentioned these in the first post.
Most of us don't like doing that and just let the Alk fall on its own. That is what I would do.
A old method for lowering the Alk is to add Ca++ and an old method for lowering the Ca++ its to add Alk. By far the more common is to lower the Ca++ by increasing the Alk. Randy talks about this in his article on Ca++ and Alk balance. Lowering the Alk is not all that safe as the other. I should have mentioned these in the first post.
Most of us don't like doing that and just let the Alk fall on its own. That is what I would do.
Icefire
Seasoned reefer
http://reefcentral.com/forums/showthread.php?s=&threadid=1158980
That sps was fine until dosed baking soda.. On second day.
I only have softy, I could remove that frag before putting the sump online and let it slime a bit before adding it back.
Any thughts?
That sps was fine until dosed baking soda.. On second day.
I only have softy, I could remove that frag before putting the sump online and let it slime a bit before adding it back.
Any thughts?
That wil be interesting. What is the pH ?
A review. Scroll down to here
Omega = 1 (risky: dissolution of aragonite begins here)
Omega = 6 (non-biological precipitation is more likely)
Calcium and Alkalinity Balance Issues
http://reefkeeping.com/issues/2002-04/rhf/feature/index.htm
A review. Scroll down to here
Omega = 1 (risky: dissolution of aragonite begins here)
Omega = 6 (non-biological precipitation is more likely)
Calcium and Alkalinity Balance Issues
http://reefkeeping.com/issues/2002-04/rhf/feature/index.htm
Your pH is to low. Spiking the pH will work. Again me I would just leave the tank alone or do a large water change. There is another method but I consider it dangerous, that is adding HCl, Muriatic Acid to the water. You would have to run some small sample tests, so you now where you are at and don't screw up when adding to the tank/sump.
Icefire
Seasoned reefer
Gee I did some work, tring to precipate, waterchange, adding Phosguard, remove carbon, remove 75% cyano, dosed Erythromicin (800mg), skimmer isn't foaming at all(should be overfflowing), tested 20 times+,
The 820Ca was funny, a record! My Mg must be High.
All look good, except the water isn't 100% clear now but fish/corals look good.
Hope the cyano will be gone!
The 820Ca was funny, a record! My Mg must be High.
All look good, except the water isn't 100% clear now but fish/corals look good.
Hope the cyano will be gone!
There must be a reef safe way to drop kh
Yes there is
3 large water changes.
You can NOT lower dKH with CO2 it has NO effect on it. It only cause a shift in the pH. Sulfuric acid is a no-no.
Alkalinity = Acid Neutralizing Capacity and HCl is an acid and the best acid for this in water. It also lowers the pH. Your Alk kit works off of titration which is adding an acid like HCl until it reaches an end-point of about pH 4. The amount added is = to Alk.
Something to read
What is Alkalinity
http://www.advancedaquarist.com/2002/2/chemistry
Yes there is
3 large water changes.You can NOT lower dKH with CO2 it has NO effect on it. It only cause a shift in the pH. Sulfuric acid is a no-no.
Alkalinity = Acid Neutralizing Capacity and HCl is an acid and the best acid for this in water. It also lowers the pH. Your Alk kit works off of titration which is adding an acid like HCl until it reaches an end-point of about pH 4. The amount added is = to Alk.
Something to read
What is Alkalinity
http://www.advancedaquarist.com/2002/2/chemistry
