ESV AQUARIUM PRODUCTS CALCIUM HYDROXIDE (KALKWASSER POWDER) Apex The single-use sachets are individually

The single-use sachets are individually sealed so you use fresh buffer each time you calibrate

it’s not just about whether you’ll have one

What's in the box

it dramatically reduces the chance that your pump would continue to add large volumes of water to the tank before you could realize it and fix the situation

one-button design makes getting your results easy

ESV AQUARIUM PRODUCTS CALCIUM HYDROXIDE (KALKWASSER POWDER) Apex The single-use sachets are individuallyCalcium Hydroxide (Kalkwasser Powder) Calcium Hydroxide is a 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. Our product is extremely pure and meets American Water Works Association and Water