Alkalinity

[canareef]

What could be the negative effects of having your alkalinity to high? I'm not having this problem I'm just wondering.

 

[bang guy]

Calcium carbonate precipitation.
This may sound like a mild side effect of high alkalinity but I have seen many tanks crash as a result. Typically from people not understanding that raising PH with a buffer is the wrong thing to do.

 

[jerryatrick]

It would depend on how the high alk is effecting your other parameters. You could have a very low calcium level due to the high alk level. Calcium as you may already know is very important in a reef tank. The reason calcium levels need to be high is because many reef inhabitants need it to build their skeletons.

 

[canareef]

Thanks I'd read before about Calcium precipitation when adding calcium I was just wondering if Calcium carbonate would do the same when raising your ALK and if there were any other effects.
Thanks again for your quick answer.