Description
After more than a year of bench testing many branded kalkwasser products, we've concluded that Mississippi Lime VitaCal-H is the ideal calcium hydroxide for our K1 and K2 Kalk stirrers.
We started using this kalkwasser in 2008 and designed our stirrers based on its performance and mixing characteristics. This calcium hydroxide easily maintains consistent high pH, calcium, and alkalinity saturation levels; it mixes easily and reliably delivers a clear saturated effluent while forming a non-clumping slurry at the bottom of the stirrer.
We have seen a lot of brands of kalk over the years and have helped over 10,000 enthusiasts implement a kalkwasser dosing strategy using our equipment. We know kalk... After bench testing all the available options, we felt so strongly about our recommendations that we decided to bring back the king.
In the past, this product was widely available from our friends at a large BULK supplier, and we were happy to refer our customers their way to purchase. Then something changed... While their replacement is very high quality, it unfortunately does not work in our stirrers. Its density is 1.7x that of normal calcium hydroxide, and it tends to clump and turn to a solid, which in turn burns out stirrer motors. As a result, we do not recommend that product in our stirrers, and we are bringing back what we continue to use and recommend.
Sizes Available
1 Gallon: 16 US cups or 4.5#
5 Gallon: 80 US Cups or 22.5# with Gamma Seal Bucket Lid
Not sure how much you need? Try the Kalkulator!
🔒 Every order ships with Package Protection
Your coral travels alive and overnight — so we protect the whole trip. Package Protection covers carrier delays, loss, theft, and damage in transit, with replacement or store credit if FedEx drops the ball. It's added at checkout (from $9.99) and we strongly recommend keeping it on.
Plus our DOA Guarantee always has the coral's arrival covered — two safety nets, from our bench to your tank. 🪸