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Results of continuous high Alkalinity?

erics210

NJRC Member
What are the effects on corals running Alkalinity at above 13-14 dKH?

Background...
Was dosing BRS 2 part plus magnesium to keep at 8dkh 450 calcium and 1250 magnesium.
Then about 2-3 weeks ago, realized my old Hanna tester for alkalinity was not accurate. Ran a few manual Red Sea tests and realized my Alk was actually 16.2.
Bought a new Hanna tester and verified. Also had local shop verify.
Combination of Reef Crystals salt, which I tested the fresh mix at 13.2 and any dosing I was doing jacked the Alk through the roof.
So I would never be able to lower my alk if continuing to use reef crystals, which i have used for all 6 years.
So about 2 weeks ago I switched to Tropic Marin Classic. I did a few 30 gallon water changes on my 135 gallon system, reducing my Alk from 16.2, to 14.2, then 12.8, now at 12, which I know is still high. Maybe this is a big part of my problem, as This would be at a minimum a year long issue with the new tank and used Hanna tester.
Will be doing another 30 gallons today.
Also put my skimmer back online. I pulled it because I was having some zoas wither on my, thinking it was low nutrients I pulled the skimmer. BUT may be the super super high alkalinity.

Sooo. Not freaking out until my alk is back in a nice target area, 8.5. then once stable and there for a while, I can re calibrate my expectations.
 

amado

Dal
Staff member
Board of Directors
NJRC Member
Alk will go down on its own. I stopped using reef crystals because it mixed at 12dkh and I like to keep my alk at 8 . You should also confirm your salinity and ph. It might be a good idea to get a ICP test to see if anything else is out of wack
 
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