Quote:
Originally Posted by lordicon
if your tank uses up alkalinity wont the calcium go up then too? i use hanna tester for phos and Salifert for cal and mag
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No they are used in a fixed ratio , so your drop in Alk should have had a drop in calcium of about 20ppm , calcium does not raise by adding alkalinity the only way for calcium to rise is to add calcium , so it's either being added somewhere or the test itself is off either from user error or the kits testing noise