How long to mix Kalk for?

Gator_Reefer

Active Member
View Badges
Joined
Mar 25, 2019
Messages
103
Reaction score
70
Review score
+0 /0 /-0
Hi - Wondering whats a reasonable mixing or stirring time to shoot for when adding kalk powder to my 5g ATO?

Currently I mix for about 10 seconds until its all consistently cloudy and replace the lid.

Concerned about if I mix too long due to CO2 and losing kalk potency, but also wondering if Im not mixing it long enough?
 
Reef Chasers Aquaculture

Garf

Valuable Member
View Badges
Joined
Oct 23, 2020
Messages
1,409
Reaction score
1,720
Review score
+0 /0 /-0
Location
BEEFINGHAM
Hi - Wondering whats a reasonable mixing or stirring time to shoot for when adding kalk powder to my 5g ATO?

Currently I mix for about 10 seconds until its all consistently cloudy and replace the lid.

Concerned about if I mix too long due to CO2 and losing kalk potency, but also wondering if Im not mixing it long enough?
Sounds ok. I actually fill a separate 25ltr container and shake it to death for a few seconds, let it settle, then put it in the ATO once a week, just to reduce the amount of powder at the bottom of the ATO..
 

Dennis Cartier

Valuable Member
View Badges
Joined
Aug 25, 2016
Messages
1,143
Reaction score
1,474
Review score
+0 /0 /-0
Location
Brampton, Ontario
Each situation will be different depending on the source of the kalk, if you are starting with fresh kalk or adding to an already existing kalk slurry in a reservoir.

The best method is to put an EC probe into the kalk reservoir, the ATO in this case, and watch for the reading to reach 10.3 mS/cm. At this reading the kalk is fully saturated. As the EC reading decreases, so does the saturation of the kalk. So at 5.15 mS/cm, you are at 50% saturation, etc. How long you need to mix for will become apparent when monitoring the saturation level using EC.

As you are using this in an ATO, a handheld pen type that can be dipped and then removed and stored would work. You might be surprised by the readings you receive which may show that you are not achieving as much saturation as you think you are.

The opposite is also true. In situations where your alkalinity is getting too high due to kalk over supplying alkalinity when used in an ATO. You can use the EC reading to fine tune the amount of kalk to add to acheive less than saturation and dial in the daily alkalinity. Admittedly this is less rare than going for full saturation, but does happen with ATO / kalk users occasionally.

Dennis
 

What is the best "cleaning product" or home recipe for cleaning reef tank equipment?

  • Water and scrubbing

    Votes: 54 12.8%
  • Citric Acid

    Votes: 209 49.6%
  • Vinegar

    Votes: 131 31.1%
  • Hydrogen peroxide

    Votes: 11 2.6%
  • Lemon Juice

    Votes: 1 0.2%
  • Other (please explain)

    Votes: 15 3.6%
LA
Top