Originally Posted by Dr.Nate
I forgot about Mg
....how does it affect Ca
Not much in regards to Ca
at all, it helps alkalinity stay in solution against the Ca
. If Mg
is low, Ca
will commonly be high or climb uncontrolabley. Low Mg
will also inhibit alkalinity from gaining ground against the rising Ca
. If you have a steady alkalinity, low Mg
would not commonly be the issue. The only reason I mentioned it is when heavier than normal Ca
additions are made with a less than desirable Mg
will typically fall off as well. If your Mg
is above 1200 ppm
, I wouldn't worry about it much.
And my dkh could stand to be lowered to 10 or 11...it's been high for awhile.
It's a tad high but nowhere near dangerous, typical results for IO. Ideally you want it somewhere around 7.5-8.5 with a balanced Ca
reading. Not much reason to go beyond that unless you have cronic pH problems. Once the Ca
level is corrected, it will hopefully fall into balance. You'll just need to make sure you tweek the newly mixed saltwater before performing water changes to maintain that balance.