ESV Calcium Hydroxide (Kalkwasser) [3.5 lbs/1600 g]


  • Model:  WTEV-102ESV

ESV Calcium Hydroxide (Kalkwasser) [3.5 lbs/1600 g]

BRIEF DESCRIPTION: Calcium Hydroxide is the proven standard for maintaining calcium concentration and alkalinity in closed marine systems.
In stock - Usually ships the next business day.

  • 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.
  • The product is extrmely 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 the aquarium system so as to prevent localized precipitation and the resultant loss of alkalinity.
  • The packaging includes lot number, date tested and the date filled. Complete instructions for use are also provided.


How is my order shipped and what does it cost?

Orders are shipped either by Courier [currently FedEX Ground] or Postal Service --- the choice is yours!

For delivery by Courier, you pay the actual charges based on a 1 kG package [2.2 lbs] shipped via ground service, plus a nominal $1.00 service charge to cover the cost of insurance and packing materials. We pay any additional charges.

For Postal Service (your best value), shipping on orders under $50.00 is $11.95 to most locations in Canada, with the Exceptions noted below. For orders between $50.00 and $100.00 the rate is $7.95, for orders between $100.00 and $200.00 the rate is just $4.95 and for orders over $200.00 shipping is FREE. The more you order the more you save! The delivery standard for this service is between 1 to 7 business days between all major centers.

NOTE: Additional Shipping Charges apply to orders being shipped to the NWT, YK, NU and some rural or remote locations in Canada as well as on over sized or heavy items indicated by the or - Additional Shipping Item symbols.

When will my order be shipped?

On weekdays, in-stock merchandise is shipped the same day if received by 2:00 pm EST. Orders received after that, or on weekends or holidays, are shipped the next business day.

Do you ship to the US or to other International destinations?

Currently we are only shipping within Canada.


What if I want to return an item?

Should you find it necessary to return an item, please call us first. All returns should be properly packaged to avoid damage and should include all original boxes and paperwork to receive a refund, replacement or credit. Shipping fees are not refundable, unless, of course, you are returning defective merchandise or merchandise we sent in error.

What do I do if a product breaks or doesn't preform as promised?

Keep all warranties and owner's manuals you receive with your merchandise. In the event an item becomes defective or just doesn't live up to your expectations, please refer to the warranty information you received for proper handling procedures.