$4.79
$5.99
50% OFF! Hot items selling fast—Grab them before they're gone!
Most important elements are carbonatesCalcium and magnesium. As soon as corals are added to the aquariumit is essentials to test these values at least weekly with the Colombo additives: KH plus, Calcium plus and Magnesiumplus the values can be adjusted to the desired level. Calcium Test Easy to Use 40 Tests Full Instructions Included