Magnesium running low

[Vins loh]

magnesium went low on sudden . . A month before was at around 1450 salifert text kit . 

After that till now it stay at 1200 - 1250 . Try dose aquaforest magnesium but still same . .  Any ideal ?   Thanks alot 

Test kit no problem . Brought 1 new test kit tested also same. 

[SubzeroLT]

How much did you dose to bring up from say 1250 to 1450?

Tank size (Liters)? Dose liquid or powder?

[Harlequinmania]

maybe try another brand of magnesium and compare it with another set of test kit.. either one could be wrong ..