BRS Bulk Kalkwasser (Calcium Hydroxide) Aquarium Supplement

BRS Bulk Kalkwasser (Calcium Hydroxide)
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  • BRS Bulk Kalkwasser (Calcium Hydroxide)
  • Kalkwasser: The Easiest Way to Maintain Ca, Alk & pH
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BRS Bulk Kalkwasser (Calcium Hydroxide) Aquarium Supplement

123 Review(s)

Choose a size

1/2 Gallon
SKU: 000242

reg. $8.99

Special Price: $6.00

1 Gallon
SKU: 000241

reg. $12.99

Special Price: $9.00

5 Gallon
SKU: 000245

reg. $54.99

Special Price: $38.00

  • Works great By on 9/25/2017

    This is why I shop at BRS
    You can get what you need in bulk price
  • Meet my needs By on 5/2/2017

    I 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 on 5/2/2017

    Kalk 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 on 4/10/2017

    Just 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 on 3/21/2017

    Great at maintaining my levels with my ato. Clears pretty fast
  • Kalkwasser By on 1/24/2017

    Great stuff, good price.
  • I thought all kalkwasser was the same By on 12/31/2016

    I 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 on 9/26/2016

    A cheap and easy way to keep my calcium and alkalinity where I want it using my ATO.
  • It's Kalk -- It works! By on 8/19/2016

    Like all BRS products it's a solid choice which isn't overpriced and works great. I'm running a small tank with frags only at the moment so I'm running 1 TSP per gallon and tuning exactly how much to put into my ATO -- So far, 1 TSP seems just fine.
  • Great Product By on 4/29/2016

    I've had a small 24 gallon reef nano aquarium for years with varying success. Keeping PH above 8.0 was impossible. No sooner would I get it there and the next day it would be 7.6 or 7.8. Adding supplements was just a temporary solution. Alk was always 12 or higher. Calcium was ok, but with supplements.
    I happened to see Ryan's video on kalk and using a dripper system and I thought I would give it a try. I bought a 5 gallon aquarium (the only size that would fit in my stand) and made a sump out of it with several baffles, just like the big boys do. Adding an overflow box with a drain and pump to push the water back into the main aquarium made it work. I drip Kalk into the sump using a container that holds over a gallon of water. Not only does this help with evaporation but PH is now a steady 8.2, Alk is at 10 and calcium at 420.
    In the two weeks I've been using this, my corals have opened dramatically and I can see growth.
    I wish I had done this years ago. Thanks Ryan for posting all those videos.