A: Reef Advantage Calcium™ is a concentrated calcium supplement capable of raising 20 gallons of water by 25 ppm of calcium with only 1 teaspoon. The biggest advantage is the ability to know exactly how much product to add in order to achieve any calcium level while restoring other essential ions. As an added bonus it mixes to a pH of 8.3 to 8.6 so you can forget about the pH battles associated with other calcium supplements. Additionally, it also contains strontium and magnesium ratios proportional to typical depletion rates. If Reef Advantage Calcium™is used to maintain calcium, then other strontium and magnesium supplements are not necessary.

A: Our Reef Advantage Calcium™ and Reef Calcium™ are completely different calcium supplements. Reef Advantage Calcium™ is an ionic calcium that is very concentrated and very economical to use. Reef Calcium™ is an organic calcium complex that is very readily available. The calcium in this product is bound to an easily metabolized carbohydrate, hence it being very available and your corals do not have to expend as much energy to use this form of calcium. In using these products together, I would consider Reef Advantage Calcium™ your primary calcium supplement and Reef Calcium™ as your secondary calcium supplement.

A: Reef Complete® is the liquid version of Reef Advantage Calcium™. They are both ionic calcium supplements that also provide magnesium and strontium in typical utilization ratios. Since they both are the same, it simply comes down to whether you prefer liquids or powders. I personally prefer liquid because they are simple to dose and no pre-mixing is necessary. That being said, powders can be very economical. Reef Calcium™ is an organic calcium meant to help maintain calcium levels in a system, while Reef Advantage Calcium™ and Reef Complete® are meant to raise calcium levels in the system. Reef Calcium™ is a poly-gluconate calcium that will provide more calcium to the system without the corals having to expend any extra energy, thus increasing growth and maintaining calcium levels. Reef Calcium™ typically will not be used to raise Calcium in the system, but rather to maintain calcium that is already existent in ideal levels. If levels are not in the ideal range, we would recommend that you use Reef Complete® or Reef Advantage Calcium™ to boost calcium levels.

A: To make a stock solution, you will use the following formula for Reef Reef Advantage Calcium:

____(x)____ (amount you want to raise calcium each week) ÷ 12 ppm (amount that one standard dose raises calcium) = ____(a)____(how many doses you would need per 150 L to raise calcium by x)

______(a)_____(result (a) from above) × 5 g (standard amount of grams per 150L) = _____(b)______(amount of grams per 150 L needed to raise calcium by (x) ppm)

____y____(your tank volume) ÷ 150 L (standard dose volume) = ___(c)___ (amount of dose you need for (y))

___(b)___ (see (b) above) × ___(c)___(see (c) above) = ____(d)_____ per week

Divide by 7 to get daily amount

For your reference: The amount of Reef Advantage Calcium™ that we have dissolved successfully is 1tsp in 25-30 mL of liquid. That means that for 1 L of RO/DI water you should be able to successfully dissolve 33-40 tsp (165 g-200 g) of Reef Advantage Calcium™. These are only estimations based on our findings, and results may vary in a larger volume of water.