Quote:
Originally Posted by untamed
I assume that you are using some sort of balanced Ca/Alk supplement. Generally speaking...if you are measuring low Alk it probably means that you aren't adding enough of the balanced supplement. You might think that more balanced additive would drive BOTH Ca and Alk up...but it doesn't work quite like that.
Another way of saying the same thing...is if you are not adding enough balanced additive (ie: Ca Reacter running to low, or not enough Kalk, or not enough C-Balance etc....), you'll see low Alk before you see low Ca.
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I'm adding the Seachem Reef Builder which says it boosts alkalinity. I'm not sure what is in there, though it does mention there is some Ca amongst other cations. I have not seen [Ca] below 400 for months and it has come up t0 425-450 since I've gone hard on the alkalinity (I wasn't testing the alk for ages since I had never had trouble with it before).
If I'm not adding enough of the alk booster should I expect to see an immediate rise followed by the slow decline over the next two days? I don't have any SPS so I wouldn't expect to have such a high alkalinity demand in the tank.
I'm also wondering if I would be better off using washing soda or baking soda to get back to a better ratio of Ca to carbonate?