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BrsTV Investigates Kalkwasser

VJV

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#randyBRS hi! In the context of your recent findings on pH levels and the impact in coral health and above all growth, it would be interesting if you guys could make a short video on kalk. What is the best way to mix to ensure full potency (how much, how long, until clear? Manual, pump...) and what is the best way to dose.
I personally have used it with a 5 gallon deposit and a Kamoer dosing pump linked to a timer so that it would only dose during the night continuously at 2ml/min to combat pH drop.

However, I was never able to mix it clear, for as much as I tried, using a powerhead or manually.

Would love to see you guys diving in a bit deeper
 

Bulk Reef Supply

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Love the idea! We've got a few different kalk videos on the YouTube channel with week 30 of the 52 Weeks of Reefing series and the video titled "Which Kalkwasser additive: store bought, hobby-grade, or USP-pharma?" probably being some of the more in depth. One thing that we never really covered in great detail was the setup and operation of a kalk stirrer. If we're talking best practices in implementing kalk, it would be hard to ignore a stirrer with a dosing pump feeding it. Maybe kalk is something worth revisiting with all of the pH talk lately :)
 

kenchilada

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Kalk is great. I’m just getting back to the hobby and I’m surprised how few people know of it or use it. I will definitely be using my Deltec KM500 on my new system.

I think any video on kalk would benefit a lot of people.
 

chipmunkofdoom2

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BRS should consider stocking and selling food grade (or better) sodium hydroxide. Using Randy's new high-pH recipe gives you the same pH boost as limewater, but in a two-part. This really feels like one of the first dosing "innovations" we've had in a really long time. No large reservoir needed for limewater, no waiting for it to settle out impurities, no making sure your pump doesn't suck up the lime slurry at the bottom, no more dosing with an unreliable and prone-to-failure ATO. Really the only downside to this opposed to limewater is the salinity increase, but that happens with standard two parts anyway.

I'm going to switch to a NaOH two-part once my 5 lbs of calcium hydroxide is gone.
 

Potatohead

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BRS should consider stocking and selling food grade (or better) sodium hydroxide. Using Randy's new high-pH recipe gives you the same pH boost as limewater, but in a two-part. This really feels like one of the first dosing "innovations" we've had in a really long time. No large reservoir needed for limewater, no waiting for it to settle out impurities, no making sure your pump doesn't suck up the lime slurry at the bottom, no more dosing with an unreliable and prone-to-failure ATO. Really the only downside to this opposed to limewater is the salinity increase, but that happens with standard two parts anyway.

I'm going to switch to a NaOH two-part once my 5 lbs of calcium hydroxide is gone.
Ryan has stated a few times he won't do it because he believes it is too dangerous for the average person to be messing around with.
 

randyBRS

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Although there will be far less Kalk slurry using pharma grade Calcium Hydroxide over others, I haven't seen any of them mix completely homogeneously without any insoluble left at the bottom of the container. (Meaning it won't ever mix 100% clear, but it's the clear saturated solution we want to dose)

Randy Holmes-Farley has a couple of articles out there about mixing calcium hydroxide and reaching max saturation based on electrical conductivity. I'm probably butchering this, but if I remember correctly there is a point of "overmixing" where there are diminishing returns related to electrical conductivity as well as other factors that also affect max saturation tied to more prolonged exposure to ambient CO2.

There is probably a BRStv Investigates in here somewhere. I hope we can explore this deeper in the future! :)
 

Which do you prefer?

  • A few LARGE, not as colorful less expensive, coral colonies filling your tank

    Votes: 25 47.2%
  • A lot of TINY, but very colorful more expensive, frags covering the rock

    Votes: 20 37.7%
  • Other (please explain in thread)

    Votes: 8 15.1%

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