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March 3, 2021
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Product Detail

Item#: SC1003
  Type Use:
  Units/Case: 1
  Wt Each: 1.00

Product Name: Reef Complete 500ml
Category: Additives*
Subcategory: Coral Calcium, Magnesium, & Alkalinity
Manufacturer: Seachem
Reef Complete is a concentrated (160,000 mg/L) optimized blend of ionic calcium designed to restore and maintain calcium to levels found in natural seawater without affecting pH. Calcium and carbonates are essential to all coral growth. If either becomes deficient, coral growth will cease, followed by a rapid decline in coral health. To prevent this you must provide calcium (Reef Complete) and carbonates (Reef Builder or Reef Carbonate).

Reef Complete also includes magnesium and strontium in amounts proportionate to typical utilization ratios (100:5:0.1, Ca:Mg:Sr). This allows one to maintain these two important elements while maintaining calcium.


BEGINNER: Use 1 capful (5 mL) per 80 L (20 gallons*) twice a week. Check calcium every 2 weeks and adjust amount or frequency accordingly.

ADVANCED: Check calcium level, then follow dosing regimen above until calcium is adjusted to 380Ð420 mg/L. Each capful will raise calcium by about 10 mg/L. Size or frequency of amount added can be adjusted, but do not exceed 25 mg/L per day. Thereafter, use as required to maintain calcium.

EXPERT: After determining the calcium consumption rate, set up a continuous drip system. Use the following formula to determine how much to add to your top-off water: m=0.025vc (m=mL of product to add to top off water, v=volume of tank in gallons*, c=amount to raise calcium in mg/L). For example, if you want to raise calcium by 20 mg/L in a 50 gallon* tank, then you would add 0.025x50x20=25 mL into the top-off water.

HINTS: If used with Reef Calcium, it is not necessary to exceed 380 mg/L total calcium. Calcium over 400 mg/L is not recommended. Use a test kit to measure calcium.

DO NOT OVERDOSE: Excess calcium may enhance the loss of carbonate alkalinity. Do not directly mix with any carbonate supplement. Best if calcium & carbonate additives are added on alternate days or at least 30 minutes apart.

Guaranteed Analysis Amounts per 1 g

Calcium (min) -155.0 mg

Calcium (max) -160.0 mg

Magnesium (min) -8.0 mg

Strontium (min) -0.16 mg

Q: I have the Reef Complete calcium supplement, and I was wondering exactly what kind of calcium is in this stuff. I also would like to know if this kind of calcium is able to be accurately detected by the SeaTest calcium test kit.

A: The type of calcium in Reef Complete is an ionic form of calcium (calcium chloride) and is easily detected by the available calcium test kits on the market.

Q: Can Reef Complete be used alone for raising and maintaining calcum or do you need to use Reef Calcium also?

A: You can have a successful reef aquarium without the use of Reef Calcium as a supplemental source of calcium. The advantage of Reef Calcium, which is very unique to our company, is that this source of calcium is bound to an easily metabolized carbohydrate. When the coral metabolizes this carbohydrate, which takes virtually no energy from the coral, the calcium goes right along with it. Because of the form of calcium this is, it can not be as concentrated as Reef Complete. Because of this it is more economical to use Reef Complete as your primary calcium supplement, but you also derive a benefit when using Reef Calcium as a secondary calcium supplement.

Q: Do I have to turn off my canister filter and protein skimmer when I add Reef Complete?

A: No, Reef Complete will not be impacted by a canister or protein skimmer. It is perfectly acceptable to leave this equipment running while dosing this supplement.

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