calcium

shobby

Member
Just wondering what the proper number is for calcium, and what if it is higher than this, will it hurt?
Thanks Shell
 

bang guy

Moderator
400ppm - 500ppm is a good range. If you're looking for a single number I'd suggest 420ppm.
Keep in mind that a good Alkalinity is more important for corals.
 

bang guy

Moderator
Originally Posted by shobby
http:///forum/post/3236358
Not trying to be stupid, but what is alkalinity and can it be tested for? Shell
The definition of alkalinity is basically the ability of your water to neutralize acids. It creates a fairly stable PH and this benefits the animals in your aquarium. In our aquariums Carbonate, Bicarbonate, and Borate are the major contributors to Alkalinity.
For reefkeepers it has an additional role, Carbonate. Coral skeleton, snail shells, Clam shells, etc. are mostly Calcium carbonate. Carbonate makes up 50% of Calcium carbonate so without Carbonate corals cannot build skeleton.
Alkalinity test kits are as widely available as Calcium test kits. Salifert makes a very accurate kit. Some test kits are labeled "KH". For saltwater hobbiests the terms are interchangeable.
 

bang guy

Moderator
Originally Posted by shobby
http:///forum/post/3236688
My ph is usually at 8.2, does that mean that my alkalinity is good?
Shell
It means your Alkalinity is probably OK at the time you tested PH. You cannot know for sure without a test kit.
 
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