- BRS Bulk Kalkwasser (Calcium Hydroxide) Aquarium Supplement (DISCONTINUED)
Dosing with BRS Bulk Kalkwasser is one of the very few proven, effective methods to add calcium and alkalinity with a single product while maintaining pH at an affordable price. Commonly used in conjunction with auto top off systems. BRS Bulk Kalkwasser is produced with the highest quality material available to the aquarium industry.
- Before dosing Kalkwasser, it is necessary to test and raise calcium and alkalinity levels to their correct levels. We suggest using Calcium Chloride and Sodium Bicarbonate. Kalkwasser should not be used for this because, in large doses, it will significantly raise pH.
- Use the BRS Reef Calculator to determine proper bicarbonate and calcium chloride amounts to adjust alkalinity and calcium.
- Maintain new levels with Kalkwasser using an Auto Top Off System.
See Full Details for more information on Kalkwasser, Calcium Chloride, Sodium Bicarbonate and Magnesium Mix and their effects on your tank.
Kalkwasser - This will be used for daily dosing to maintain calcium and alkalinity levels as well as elevate the tanks pH. Because this product does elevate the pH, it is important to dose slowly in small amounts. This product is designed to be used daily to continually replace calcium and alkalinity as it is consumed and not to make large adjustments.
Calcium Chloride - This is used to make larger adjustments to calcium levels. This product has no effect on the tank's pH so it is possible to make larger changes to calcium levels in single doses.
Sodium Bicarbonate - This is used to make larger adjustments to the tank's alkalinity levels. Sodium bicarbonate does have a small temporary lowering effect on the tank's pH. It is possible to make relatively large adjustments to the tank's alkalinity without a major impact on the tank's pH but it is wise to monitor the tank's pH while dosing.
Magnesium Mix - Dosed occasionally to maintain magnesium levels. Maintaining correct magnesium levels helps prevent calcium and alkalinity from precipitating and makes maintaining correct parameters much easier.
Kalkwasser By Rafaylina on 3/17/2018Rafaylina would recommend this product to a friendThis kalkwasser is easy to mix. Also easy to use with an ATO once you have your parameters dial in..
Works great By Jack on 1/16/2018Jack would recommend this product to a friendThis product is a great beginner way into keeping your cal and alk up with just your ato. I've been running it over a year now and my nano reef tank is doing great.
Great for any hard coral out there By Jack on 12/5/2017Jack would recommend this product to a friendI purchased the 1 gallon and it's last me about a year on my two nano tanks keeping my calcium up and my corals are growing great
This is a great product By Richard on 11/24/2017Richard would recommend this product to a friendI've been using this product in my BioCube14 Nano mixed reef for approximately 6 months now. I mix 2 teaspoons in 1 gallon of RODI water and shake well. It takes a couple of days for a very thin layer of residue to settle at the bottom of the container leaving a nice clear saturated kalkwasser solution above ready for use. I remove the clear solution from the mixing container (leaving the residue layer behind in the mixing container) and pour the clear solution directly into my make-up water reservoir. The kalkwasser is automatically dosed every time the auto top-off system does it's thing. I use an Auto Aqua Smart ATO - Micro (which has worked flawlessly for more than a year now) and I submerge the ATO pump directly in the kalkwasser-filled reservoir. After six months of operation I removed the pump to inspect and clean as required. I expected a build up of white crusty material throughout the pump but in fact it was very clean. I did little more than rinse the pump with fresh water and wipe it off before reinstalling it (I still keep a spare pump on hand just in case). Prior to using this BRS kalkwasser product my pH was consistently between 7.8 and 8.1 (measured with an electronic pH probe). Since introducing this product and dosing method my pH is consistently between 8.1 and 8.3 including during the nighttime when the pH drops toward the lower end of this range. My 'critters' are happy with the results and so am I. ONE NOTE OF CAUTION: This product is a very fine powder that easily goes airborne when being handled; even very gently handled. Protect your health by avoiding inhalation or letting it come into contact with your eyes. Happy reefing!
Works great By Dan on 9/25/2017Dan would recommend this product to a friendThis is why I shop at BRS
You can get what you need in bulk price
Meet my needs By Jkor on 5/2/2017Jkor would recommend this product to a friendI purchased this to kill coral that was growing in areas I did not want it. If I did not it was going to take over. Put some on some coral, let it settle. The coral slowly dies and this does not have a negative effect on the rest of the tank.
value By mike112 on 5/2/2017mike112 would recommend this product to a friendKalk is definitely the way to go and this is by far the best value on the net!! Thanks guys and keep up the videos! I have learned so much from you guys. You brought me back into the hobby.
Easy to use and does its job. By Doug E Fresh on 4/10/2017Doug E Fresh would recommend this product to a friendJust as the title says. Once I raised my levels to where I wanted them and a little tinkering to get dosage right it keeps my Cal and all right where I want em.
Great By Jd on 3/21/2017Jd would recommend this product to a friendGreat at maintaining my levels with my ato. Clears pretty fast
Kalkwasser By Kris on 1/24/2017Kris would recommend this product to a friendGreat stuff, good price.
I thought all kalkwasser was the same By Chas on 12/31/2016Chas would recommend this product to a friendI thought all kalkwasser was the same, but I was wrong. Usually after settling overnight there is a layer of undissolved material on the bottom of the bucket, but with this stuff there's practically nothing. Pretty impressive for a low cost option.
Cheap and easy By Eric on 9/26/2016Eric would recommend this product to a friendA cheap and easy way to keep my calcium and alkalinity where I want it using my ATO.
Special Price: $29.74
Special Price: $50.99
Special Price: $29.74
I don't have a,auto top off, how would I dose then?
If you don't have an auto top off (which I would highly recommend) then your going to need a kalk dripper of some sort. Check out this video we made on making your own kalk dripper.
Do you ship Kalkwasser into Canada?
Things with customs can change rapidly, but at this time we don't have any issues sending Kalkwasser to Canada.
Does kalkwasser actually raise levels? Or just maintain your levels? I'm being told both.
Technically you have to raise the levels to maintain the levels (maintaining really just means your increasing the levels at the same rate its being consumed). The confusion comes from the fact that kalk would be a poor choice to try and raise the levels by more then that because of its significant pH effect. If you added enough kalk to say raise your tanks calcium from 400 to 450, you would also raise the pH to catastrophic levels. It also suppliments both calcium and alkalinity, so you can't raise one without messing with the other. Two part would be what you want for adjusting levels.
The ph in my ro/di water that I use in my ato is around 6.5. Will this be a good product to use in it to help bring my ph up. So that I can keep the ph up in my tank?
You will want to measure after you have mixed in your salt mix to make sure. RO/DI water will always have around 7.0 pH. Feel free to let us know if you have any further queations!
I use instant ocean reef crystals and habe ph issues never goes above 7.7-7.8 I know its not necessarily important for 8.3-8.4 but would like to try closer then I am. I think calcium is on the high side in IORC but can't remember dkh and never tested mag what should I do I have also heard kalk goes a long way and helps algae maybe?
We do not recommend using supplements for initial control of pH rather introducing fresh air through the skimmer may help! Some supplements such as Soda ash (alkalinity) and Kalkwasser do have increasing effects on pH but should not be used for that sole purpose. Feel free to let us know if you have any further questions!
If dosing Kalk in a ATO once you've got your appropriate levels using two-part, how often do you need to dose additional two-part while the Kalk is maintaining your levels? Is it worth it to have an automatic two-part dosing system along side of Kalkwasser or will you be adding Calcium Chloride and Sodium Bicarbonate so rarely that you might as well do it manually?
It will vary depending on your system demand. Typically on smaller systems we will test once every 2 weeks and dose 2 part to increase the levels as needed. Feel free to let us know if you have any further questions!
I currently have kalk in my 5 gallon ato. I have a mixed reef also. My question is. Should I have the lid on the 5 gallon bucket sealed? I have the kid just sitting on the bucket so I can glance in to check the water level.
I know the average rate of my evaporation is about 1gal/day. I was thinking of mixing kalkwasser with RODI and program the doser to put in 1gal/day over 24hrs.
I would use a 9gal container, so I would only have to change it evey 9days.
What ratio of RODI to Kalwasser would you recommend?
Is that a good or bad idea?
Haven't had luck with any ATO...
Any advice or pointers is greatly appreciated.
Ideally an Auto Top Off controller would be able to automate your top of water instead of guessing exactly how much evaporates. For starting with kalkwasser we recommend 1/2 teaspoon per gallon of Top off water so starting you will use a maximum of 4.5 teaspoons in your 9 gallon container. If the levels are dropping after a while you can boost up to a maximum of 2 teaspoons per gallon. Feel free to let us know if you have any further questions!
If I use kalkwasser and maintain my PH levels stable at 8.02 will that prevent me from over dosing Calcium or alkalinity or do I still need to monitor those peramiters?
Keeping Kalk consistent will tend to allow for not over dosing however it is still recommended to test for Calcium, Alkalinity and Magnesium to make sure that there is no precipitation or loss of the elements in the water column. Feel free to let us know if you have any further questions!
I am curious, how many pounds of calcium hydroxide in the 1 gallon container? Thanks!
I'm going to try kalkwasser for the fist time my question is if I'm going to do the drip method does it have to be directly into the display tank or can I drip it in the sump?
You can drip the kalkwasser in any location as long as it is convenient. Many people like to dose and drip in a high flow area to prevent any precipitation. Feel free to let us know if you have any further questions!
I've got an aqualifter on my ATO system. Will the Kalkwasser solution damage the aqualifter, or is it an acceptable means for topping off with the Kalkwasser solution?
I've added kalkwasser to my ATO with the ratio of 1 teaspoon per gallon of ATO volume. It doesn't seem to dissolve, just settle out after a couple hours. I don't run a circulation pump in my ATO as it's only 7 gallons and I'm filling it every week. Would a circulation pump help dissolve the kalk? Would you recommend the circulation pump only coming on with the top off pump? I've read you shouldn't circulate kalk when it's in an ATO, is this true?
You specifically do not want to circulate kalk as you will actually deplete it by doing so (your continuously adding co2 which will deplete it). Its normal to have some sediment when you mix kalk and nothing to worry about. Give it a good mix when you put it in and then just allow it to settle and use it.
I've been using this product for a while now. Slowly dripping it in my sump via ATO. I get a slimy clear film on the water surface of my sump. Is this bacterial or due to low flow? Any ideas how I can get rid of it?
Film on the surface of objects often can be a diatom, waste or bacteria growth and occurs on many sumps with good flow with regular cleaning a good idea to remove the film. If there is film on the surface of the water it would be related to low flow in the sump. To eliminate the film you can try changing the flow with a powerhead to agitate the surface additionally if the kalkwasser is not dripping into a high flow area it may have some precipitation. Feel free to let us know if you have any further questions!
I'm currently using the BRS 2 parts manually dosing 12mL twice a day. I have a 55 gallon with 10 gallon sump with medium stock tank with sps and lps. I can barely maintain my alk. If I start using kalkwasser with my top off water (I lose about 1/2 gallon a day), do I still need the 2 parts to maintain the alk level.
Hi, Till now I've always used RODI water with Seachem Marine Buffer for my top off water. Now that I received my Tunze Osmolator from BRS, I would like to begin using BRS Kalkwasser with my RODI water for top off. So, do I still continue to buffer the water with Seachem and mix the Kalkwasser with that? Or is the buffer no longer required?
Do you offer a dosing product for Kalkwasser? Can I just add it to my RODI reservoir which feeds the auto top off tank?
In reading some questions asked and answered, I came across one about using a circulation pump to dissolve the Kalk. The answer was not to, but could you at least use it initially to dissolve the kalk? Just when you add it in the beginning to mix it up. If not, then how would you mix it in a 20 gallon brute trash can?
If you really wanted to you could run it for like a minute, but just pouring the kalk in and mixing it for a minute or two by hand generally suffices as well. The thing you don't want to do is continue to agitate it after the initial mixing. If for example you put the power-head in for as little as a half hour you may remove a significant amount of the kalks usefulness.
My Question is if you can't put a power-head in to mix the solution because you might remove a significant amount of the kalks usefulness, then what happens when you drip the solution into your tank? With so much circulation/water movement, wouldn't that just deplete it within a few minutes?
The water chemistry in a container of a kalkwasser solution is extremely different from the water chemistry of an aquarium. In the aquarium the concentration is much lower and precipitation far less of an issue (though if you add to much kalkwasser to the aquarium and increase the concentrations too high it will precipitate just as it would in the storage container). Used correctly though that will not be a problem.