Question about high alk

[s3aL]

Im having trouble getting my alk down. Tanks been running 3 months now. Ca is 455 and alk is at 13KH. I use the LM3 for 2part dosing and have only been dosing Ca and do not even have the alk dosing at all. Wondering why its still so high? I use IO salt and know its pretty high in alk but is it THAT high? All test kits are new saliferts. Is 13KH okay to run or should I bring it down? If so, what is the best way to do that?

 

[bertoni]

IO shouldn't be that high in alkalinity. There have been issues with some of the Salifert alkalinity tests recently, so you might want to get a second opinion. pH buffers are another source of alkalinity. What's been dosed into the tank?

 

[s3aL]

Only things that have been dosed are Ca and mag to boost up to 1400 and thats it, PH is 8.1-8.2.

 

[bertoni]

What was dosed for calcium?

 

[s3aL]

Randys 2part - calcium Chloride

 

[bertoni]

Okay, that shouldn't raise alkalinity. I don't think I trust the test kit result just yet, although the SG device could be off, too. This article might help double-check the SG:

http://reefkeeping.com/issues/2004-07/rhf/index.htm