Marine DepotMarine Depot sells the best aquarium equipment, nutrition and supplements the world has to offer. Take your tank from ordinary to extraordinary today!
E.S.V.

E.S.V. Calcium Hydroxide 3.5 Lbs.

EV2102

Add to Wishlist
Low Price Guarantee
Refer Friends & Get $10 |

Similar Products

Calcium Hydroxide is the proven standard for maintaining calcium concentration and alkalinity in closed marine aquaria. The calcium provided is directly used by calcifying organisms, and the hydroxide ions provided readily convert dissolved CO2 into bicarbonate and carbonate ions, which are also directly used by calcifying organisms. The net result is no ionic imbalances in the aquarium water, which can occur through the prolonged use of other calcium supplements, such as calcium chloride. This product is extremely pure and meets American Water Works and Water Chemicals Codex Specifications. This means it`s pure enough to be used in low-levels as potable water additive by water municipalities. Due to the high pH of Calcium Hydroxide solutions, it`s important to add slowly ("dripping" is best) to your system so as to prevent localized precipitation and the resultant loss of alkalinity. Use two teaspoons of Calcium Hydroxide Powder per gallon of top-off fresh water.

Manufacturer Info

E.S.V. Aquarium Supplies
E.S.V. Aquarium Products is a Hicksville, New York based aquarium supply company that specializes in the production of aquarium additives and supplements. Their 2-part B-Ionic Calcium Buffer System is a staple in the marine aquarium hobby and is the company`s flagship product, earning favorable reviews and rankings from hobbyists of all levels of experience. Their additives are known for being affordable, easy to administer and chemically sound. E.S.V. recently released a spray dried phytoplankton that eliminates the need to culture live phytoplankton. Granular activated carbon, coral glue, salt mix and various other supplements round out their product offerings.

Ask a Question Earn 15 Points when you answer a question
Sort By :
 
9 Questions
Displaying questions 1-9
 
 
Sort by:
 

Overall, others give this:

  • 4.7

18 Reviewers (94%) would recommend this

Overall Rating:

download image
5  Star
 16
4  Star
 1
3  Star
 0
2  Star
 0
1  Star
 1
 
5
5.0
Easy to use

reviewerbadge
PROS
Cost effective
CONS
Can be messy to set up
REVIEW
As a first time using kalkwaser, I think it is alternative to keep the levels balance. It’s a little messy setting it up but the keeps my tank stable.
  • 1
Was this review helpful: Yes(1)No(0)
 
 
 
5
5.0
Simple
reviewerbadge
REVIEW
Sometimes a product needs to do what It's supposed to do without the hype. This product just that. Simple to use, great value and results.
  • 1
Was this review helpful: Yes(1)No(0)
 
 
 
5
5.0
Great Value

reviewerbadge
REVIEW
The product cannot be beat for the value. I have tried the more expensive products, and the results were the same in my opinion.
  • 1
Was this review helpful: Yes(1)No(0)
 
 
 
5
5.0
E.S.V. Calcium Hydroxide

reviewerbadge
REVIEW
Excellent product. I use it in a Kalk stirrer which is fed by an ATO. It helps keep crystal water clarity, enhances Calcium and dKH, lowers Phosphate, and stabilizes pH.
  • 1
Was this review helpful: Yes(1)No(0)
 
 
 
5
5.0
great value

reviewerbadge
REVIEW
This a great company they are the same people that make b-ionic they know what they're doing excellent quality
  • 1
Was this review helpful: Yes(0)No(0)
 
 
 
5
5.0
Electonic Eng

reviewerbadge
REVIEW
The calcium and alkalinity is perfes and the PH is 8.31.
  • 1
Was this review helpful: Yes(0)No(0)
 
 
 
5
5.0
esv calcium hydroxide

reviewerbadge
REVIEW
This is a great product it keeps my calcium where it needs to be with the correct dose this is some powerful stuff so read carefully!!! And it also helps with my ph I had trouble with keeping my ph above 8.0 and now its steady at 8.25 can't complain!!
  • 1
Was this review helpful: Yes(1)No(0)
 
 
 
Write Your Review Earn 15 Points when you write a review
Sort by:
 

Overall, others give this:

  • 4.7

18 Reviewers (94%) would recommend this

Overall Rating:

download image
5  Star
 16
4  Star
 1
3  Star
 0
2  Star
 0
1  Star
 1
 

Free, Fast, and Flexible Shipping Options

  • $2.99 flat rate shipping for orders under $29

    Most orders under $29 ship for only $2.99 using a mix of economy shipping methods including UPS Ground, USPS First Class, and/or SurePost. Your order will be delivered in up to 7 business days after it ships out.

  • free shipping for orders $29+

    We ship 99% of the products we carry for free within the contiguous United States using a mix of economy methods including USPS First Class Mail, SurePost and UPS Ground. Your order will arrive in up to 7 business days. Just spend $29 or more!

  • free faster shipping for orders $250+

    Over 90% of shoppers receive their orders within 1-2 business days. Upgrade from free economy shipping to faster shipping for only $2.99—or spend $250 and we'll upgrade you automatically!

  • need your order even faster? no problem!

    Expedited shipping services are available for most products if you are in a hurry. Get guaranteed delivery in 2 business days, 1 business day, or next day by 10:30 am. Costs vary by location.

  • buy it today and we'll ship it today

    Same-day shipping is available Monday-Friday for most products—place your order by 10:30 am PST. Pre-ordered and back-ordered items do not qualify, nor do drop-shipped, live, or frozen shipments.

  • live plants, live foods, and frozen foods delivered to your door

    We ship live plants, live foods, and frozen foods within the contiguous United States. Each of these categories is subject to its own $19.99 flat-rate shipping fee to cover the special packaging and/or expedited shipping costs required to ensure safe delivery. Orders with 12+ live plants ship free!

Learn More About Shipping

60-Day Return Period with Easy Online Returns

Return any new and unused item within 60 days for a full refund. Having difficulty with a product? Contact us to speak with an aquarium expert. If you need a replacement, fill out this form.

A small segment of the 180+ brands we carry require that customers contact them directly if/when problems arise. You can view the full list of those brands and get their contact info here.

We are unable to accept returns of Digital Aquatics, Neptune Systems, Vertex Aquaristik, Aqua Illumination (AI), EcoTech Marine, GHL, or Seneye products once the manufacturer's packaging seals have been broken.

Marine Depot is an authorized reseller for every product we carry. That means when you buy aquarium supplies from us, your products are not only backed by our own 60-day return policy, they also carry full factory warranties, where applicable. Some items have a 1-year warranty, others have limited lifetime warranties. Warranty coverage varies from manufacturer to manufacturer, so please read the product description of the item(s) you are considering thoroughly for details or contact us if you have warranty questions.

Learn More About Returns

Earn 5% Cash Back for Most Purchases

Rack up reward points to earn discounts on future purchases! You can earn reward points by creating an account, writing reviews, referring friends, subscribing to our newsletter, buying products, and more!

  • Earn 5 reward points for every $1 you spend to get 5% cash back
    Most Products
  • Earn 1 reward point for every $1 you spend to get 1% cash back
    Abyzz, American Marine, AquaIllumination, AutoAqua, CoralVue, Digital Aquatics, EcoTech Marine, Giesemann, GHL, Hanna Instruments, Hydor, IceCap, Innovative Marine, Iwaki, Kamoer, Kessil, Klir, Korallen-Zucht, Maxspect, Mur-lok, Nano Box, Neptune Systems, NYOS, Oceanbox Designs, Pax Bellum, Radium, Red Sea, Reef Glass, Reef Octopus, Seneye, Somatic, Tunze, Vertex Aquaristik, and Waterbox Aquariums

You can also get bonus reward points by purchasing select items during special sales and promotions.

Learn More About Rewards

Frequently Bought Together