Aragamilk contains magnesium so depending on the dosage amounts + the trace element additive, this is where you could be seeing the increase, not sure really. In most systems, Mg
is depeleted quite slowly except where there is the possibility of heavy alk
How high is the alk
and can you post the chemistry numbers from a batch of new SW
that has been mixing and aerated for a day?
1700 ppm Mg
is not an overly large concern but still not the "norm". The most commonly affected animals will be bivalves and sometimes univalves but typically with much higher levels than this.