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Aynesa
09/26/2008, 10:36 AM
So, I went to my LFS looking for a calcium additive, and they sang the praises of this white 1 kilo block they wanted to charge 41 dollars for. Said it would automatically add calcium as the tank needs it, add all the trace elements-- only as they're needed, etc etc etc. Here's the description I get:

Sea-Lab Formula 28 is a mixture of naturally occurring buffer compounds that maintains natural ocean concentrations of calcium, strontium, and all 15 essential trace elements. Calcium and strontium are well recognized nutrients, but trace elements are not as well understood. They are, however, vitally necessary to marine life in the aquarium. Paradoxically, these same elements, so essential to life, are also highly toxic. The trick is to tread the fine line between trace element starvation and trace element toxicity. Formula 28 is the first formula available to hobbyist and professionals that creates and maintains this fine balance. As elements are depleted from solution, Formula 28 delivers exactly equivalent amounts to replace them.

Since Formula 28 is fully buffered, there is a constant supply of essential trace elements and no possibility of toxic overload, so dosage and application are extremely uncritical. The blocks can be placed in any location where there is a moderate current. When the blocks are mostly dissolved, add a similar number.

SeaLab Concentrations (ppm)
Aluminum 0.01
Boron 4.6
Calcium 400.0
Chromium 0.00005
Cobalt 0.0005
Copper 0.003
Fluorine 0.3
Iodine 0.06
Iron 0.01
Manganese 0.002
Molybdenum 0.01
Nickel 0.002
Selenium 0.004
Strontium 8.0
Tin 0.002
Vanadium 0.002
Zinc 0.014

(http://www.premiumaquatics.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=SL-KILO&Category_Code=Sealab)

So, has anyone used this? To what success? If the claims are true, it seems like they would be a perfect replacement for all my other supplements and save me some money.... but that's a big if. I currently use Kent Marine Essential Elements, and Purple Up when my calcium gets low. So, any thoughts?

Percula9
09/26/2008, 10:58 AM
The claims are unfounded and I don't recommend their use. It is uncontrolled release of elements into your tank. Never dose what you can't measure. Purple up is also a waste of money. It is essentially fine aragonite sand which is not soluble at seawater pH. Instead use Seachems Reef advantage calcium. It is calcium,magnesium and strontium in exact seawater ratios.

Boomer
09/26/2008, 11:30 AM
I agree that stuff belongs in the "G" file :)

Aynesa
09/26/2008, 11:37 AM
The "G" file?

Boomer
09/26/2008, 12:12 PM
Garbage:)

Aynesa
09/26/2008, 03:14 PM
ahhh. I see :)