General hardness is not something you really need to worry about in SW
aquaria. General Hardness measures the cations, + ions for calcium and magnesium while carbonate hardness refers to only the bicarbonate, and carbonate anions - ions.
In salt water aquaria we are more concerned with the carbonate in the system but the trade of is total alkalinity or CaCO3
. Depending on what is in the tank animal/coral wise, higher alkalinity balanced with proper Ca
is more desired by some and not harmful to the tank inhabitants.
320ppm is a little on the higher side (17.92 DKH
) but in most cases this will fall naturally over the next few days providing no other alk
additions or water changes are made.
Have you been using the new buffer too often and are you properly measuring alk
prior to these additions? I would also suggest checking your Ca
levels. If low, the addition of a liquid CaCl
will force down the alk
naturally without problems and could be the a
reason it got out of hand.
Also make sure if/when you test, it is several hours after a buffer addition or a water change. Newly added elements will skew the results drastically.
/l = ppm
to get to mEq/l divide by 50. 1 mEq/l = 2.8 DKH