High alk

ReefJCB

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My alk is reading 11.5 right now, what is the safest way to slowly reduce that? My ATO is filled with kalk, should I change that out with ro/di?

Calcium is 450
Magnesium is 1490
Ph 8.2
 
My alk is reading 11.5 right now, what is the safest way to slowly reduce that? My ATO is filled with kalk, should I change that out with ro/di?

Calcium is 450
Magnesium is 1490
Ph 8.2
Can you simply add less kalk? Are you running it saturated (2 tsp kalk per gallons or more)?
 
Just don't dose Alk and let it drop naturally. Then when it's were you want it figure out the dose to keep it there.

It sounds like you might have more kalk in the ato than needed.
 
I've been doing a heaping tsp per gallon, probably about 1 1/4 tsp. I'll change that to RO/DI and let it come down and mess around with maybe just 1/2 tsp and see how that goes.
 

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