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

115 Review(s)

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1/2 Gallon
SKU: 000242
1 Gallon
SKU: 000241
5 Gallon
SKU: 000245
  • 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.
  • Easy, Cheap, Effective By on 3/14/2016

    Works great, lasts a long time. Easy to add. This is for those who want simple, easy to maintain reef environment.
    Next additive, mag.
  • good to use By on 3/9/2016

    make sure ur testing u can reck stuff if u dont test and try this
  • Very big bucket By on 3/9/2016

    It's much bigger than I thought and it's going to last me forever.
  • Great By on 3/5/2016

    I have been using this for a while and my corals love it
  • BRS Kalkwasser is the cheapest on the market. By on 3/4/2016

    Thanks BRS. Your Kalkwasser mix is the cheapest. It keeps my pH right at 8.4. Thank you for providing everything needed for a great reef tank at the lowest prices.
  • good stuff By on 2/15/2016

    first time i can control my ph/watch using it in your top off one malfunction and your screwed /it happened to me i like the drip it leaves me in control
  • good stuff By on 2/15/2016

    first time i can control my ph/watch using it in your top off one malfunction and your screwed /it happened to me i like the drip it leaves me in control
  • Highest quality product on market! By on 1/24/2016

    I just started to use Kalkwasser recently to help me manage the pH of my 40 gallon Innovative Marine Nuvo. Despite dosing 2 part and magnesium with BRS
    dosers my pH has been running lower than I would like. I decided to add Kalkwasser to my ATO and started with Seachem Kalk which cost more than BRS Kalk and is obviously much lower quality because even when I added only 1/2 tsp to 3 gallons of 0 TDS RODI water I made myself with the 150 gpd BRS RODI system (love it and actually makes 180 gpd with the pressure booster) a lot of it didn't go into solution. With BRS Kalk this isn't a problem at all!!! BRS Kalk must be much purer. Thanks BRS for another awesome product at a very reasonable price!!