If I am doing 20% water changes every two weeks using natural seawater, should I be worried about magnesium? I plan to get a tester. I never thought much about it, but when discussing my newly acquired sps
frags (2) the question of magnesium came up.
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55gl mixed reef pre-drilled
500w MH (120), 10 gl sump, cheap skimmer
tank est. spring '06
Is it wrong to love a clump? MACRO MANIA 
