Enriched Kalkwasser?

[The Opinionated Reefer]

What do we think of this Enriched Kalkwasser idea where they add mag and strontium to kalkwasser? I am sure I read on here before that the idea is flawed but I cant find the thread.

 

[Randy Holmes-Farley Verified Community Expert]

lol

We were just talking about Brightwell products and their lack of understanding of them.


Really disappointing they still market it. Folks should not be fooled by the misleading kalk+2 product by Brightwell.

here are my copied and pasted statements from older threads:

Magnesium is not soluble in limewater, so it will just sit on the bottom and worse, the amount present in kalk+2 is not nearly enough to meet the demand for magnesium, and far worse yet, is LESS than is present in many bulk brands of calcium hydroxide as an impurity.

Here's the Brightwell kalk+2 claim:

http://brightwellaquatics.com/products/kalk2t.php

Guaranteed Analysis
Calcium (min) 54.20% (542,000 ppm), Strontium (min) 1.00% (10,000 ppm), Magnesium (min) 0.15% (1,500 ppm)

So that is a ratio of magnesium to calcium of 1:361.

I show in this article that bulk calcium oxide (dried calcium hydroxide) has more magnesium as an impurity (1:263) and that in the actual limewater, the magnesium ratio does not exceed 1:36,000, with the remainder ending up undissolved on the bottom.

Magnesium and Strontium in Limewater

Aquarium Chemistry: Magnesium And Strontium In Limewater​

Because of a potential imbalance between the amount of magnesium and strontium used by corals, and the amount delivered by limewater, using limewater can potentially lead to depletion of both ions in aquaria.


I show in this article that a typical coral or coralline aglae incorporation rate is 0.1 to 4%by weight, for a ratio of about 1:400 to 1:10.

Aquarium Chemistry: Magnesium In Reef Aquaria

This article details the nature of magnesium in seawater, how it is added, measured, and removed from marine aquaria, and how it impacts the maintenance of calcium and alkalinity.

reefs.com

 

[The Opinionated Reefer]

There is also Reeflowers enriched Kalk.

 

[Randy Holmes-Farley Verified Community Expert]

There is also Reeflowers enriched Kalk.

Do you have a link to it? I don’t see such a product in their web site.

 

[KStatefan]

Do you have a link to it? I don’t see such a product in their web site.

ReeFlowers

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www.reeflowers.com

 

[Randy Holmes-Farley Verified Community Expert]

Looks like a knock off of the Brightwell product. I don’t recommend either one.

 

[Garf]

I’m bored again, so mixed 2 teaspoon of mag chloride and a half teaspoon mag sulfate into saturated kalk, lol
First, added magnesium
Second, gave it a good stir
Third, waited an hour

To be fair, it looks like the magnesium at the bottom would still go through a peristaltic pump.

 

[Randy Holmes-Farley Verified Community Expert]

I’m bored again, so mixed 2 teaspoon of mag chloride and a half teaspoon mag sulfate into saturated kalk, lol
First, added magnesium
Second, gave it a good stir
Third, waited an hour

To be fair, it looks like the magnesium at the bottom would still go through a peristaltic pump.

It might, but in a settled reservoir you wouldn't typically deliver the solids, and in a reactor, it will settle into (or form in) the undissolved calcium hydroxide that isn't being delivered.
.