Alk n calcium way off!!!

[sweetpea]

So I used the sea lab 27 block "72 great elements" a few monhs ago n let it delpete to nothing. Now my tanks alk is at 5 and my calcium is at 850. Im using reef crystals as my salt mix. I dont believe this would affect my calcium to a sky rocket level. I did water changes and calcium dropped from 1000 to 850. I also use seachem buffer for alk n ph. Is there something i can use to raise alk tO deplete calcium? I was gonna by reef builder for carbonate alk buffer but it states it will not deplete calcium which defeats the purpose.

[sweetpea]

Any ideas?

[CarmieJo]

So Ca and alk are inversely proportional which explains the imbalance. With the Ca that high I think that you could dump alk in all day long and it wouldn't make much difference. The only way I can think of lowering the Ca is by water changes. Since you want to lower the Ca I would just use IO or a non "reef" salt which has lower Ca than Reef Crystals.