Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Hi!
I am wondering about the difference between dissolving kalk in saltwater vs RODI. Can you dissolve more in RODI and that is superior? Overall should one only do it in RODI?
But it's eventually going to dumped into a tank of saltwater anyway? Does it not do this in the tank due to the lower concentration of kalk in RODI?You CANNOT mix it into salt water. You will instantly precipitate magnesium hydroxide and calcium carbonate.
But it's eventually going to dumped into a tank of saltwater anyway? Does it not do this in the tank due to the lower concentration of kalk in RODI?
You can dissolve Kalkwasser into salt water. The problem is that you will not have enough carbonic acid to get any kind of real carbonate from it. You may get more when you dose into your tank but you are going to end up with far more calcium than alkalinity unless you have high CO2 levels. Also around 8.5 PH you are going to get calcium carbonate precipitate. This is assuming that you are dosing a small volume and dripping it back into your tank. Dosing your tank directly will drive up the PH to 8.5 (or higher) and as in the small container will start to precipitate over that. It is possible but not very practical.Hi!
I am wondering about the difference between dissolving kalk in saltwater vs RODI. Can you dissolve more in RODI and that is superior? Overall should one only do it in RODI?
Not unless your PH is 8.5 or greater, otherwise it behaves near what you see in RO/DI.You CANNOT mix it into salt water. You will instantly precipitate magnesium hydroxide and calcium carbonate.
Not unless your PH is 8.5 or greater, otherwise it behaves near what you see in RO/DI.
Ok don't dose 2 teaspoons dose less. Dose what is appropriate to raise the PH to 8.5, or whatever keeps the tank from hard precipitating.If you dissolve 2 teaspoons of calcium hydroxide into 1 gallon of seawater at pH 8.2, the alkalinity will rise to over 100 dKh, the pH will shoot way, way above 9, and calcium will triple to over 1000 ppm.
So we are in agreement.It risks precipitation and harsh chemicals landing on organisms before it dissolves, but it is not impossible.
Ok don't dose 2 teaspoons dose less. Dose what is appropriate to raise the PH to 8.5, or whatever keeps the tank from hard precipitating.
So we are in agreement.
Also you don't have to dose into the tank you can dose into a sump or dose into a container and then drip. There are many ways to dose.
And ... what if you don't want to raise Alk, what if you want to maintain it?That is way, way too little to be useful as a supplement method.
I have shown that boosting Instant Ocean by 1.4 dKH (6.3 dKH to 7.7 dKH) with hydroxide boosts the pH by 0.66 pH units from 8.10 to 8.76.
Thus, but your assertion, the dosing solution made by mixing seawater and calcium hydroxide cannot raise the alk in the volume by even 1.4 dKH. If you wanted to boost the tank by 1.4 dKh in a day, you'd need to remove the entire tank volume, boost it by 1 dKH, and return it to that tank. That is not a useful supplement.
If that could have been done with a small fraction of the tank volume it might have been useful. But it is not.
It can with certain conditions met, but once again you only see one way of doing things and then you argue that one thing with all of your unstated conditions.If that could have been done with a small fraction of the tank volume it might have been useful.
I told the tale with all of the caveats that I am aware of. In fact the original poster liked my explanation, and yes it did answer the last half of her question. By providing useful information to her, I believe she can then make an educated decision about the first half of her post.But I do not agree that your assertions are an appropriate answer to the original question by the OP.
And ... what if you don't want to raise Alk, what if you want to maintain it?
You are making a lot of assumptions about how this might be useful.
I do.Almost no one doses doses solid calcium hydroxide.
And seriously why must you always police people. This is a board and information is shared here. You and I are not the only ones to possess information and whether we think that information is right or wrong is not for us to decide. Present your case and move on.
I do.
Would you like to see my tank?
You seriously make to many assumptions and you are way to self assured that you have all the answers.