anybody have used this?

[seamonkey2]

No. 28 Automatic Replenisher
Manufactured by Sea-Lab
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 hobbyists and professionals that creates and maintains this fine balance. As elements are depleted from solution, Formula 28 delivers exactly equivalent amounts to replace them.

Instructions for Use:

Since Formula 28 is fully buffered, this 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. Recommended dosage is three or four blocks per 50 gallons of water. When the blocks are mostly dissolved, add a similar number. Older tanks and those never treated with formula 28 will benefit from an initial treatment of 1 block per 50 gallons for a week or so. This keeps the water chemistry change gradual.




Element Symbol Concentration
Aluminum Al 0.01
Boron B 4.6
Calcium Ca 400.00
Chromium Cr 0.00005
Cobalt Co 0.0005
Copper Cu 0.003
Fluorine F 0.3
Iodine I 0.06
Iron Fe 0.01
Manganese Mn 0.002
Molybdenum Mo 0.01
Nickel Ni 0.002
Selenium Se 0.004
Silicon Si 3.0
Strontium Sr 8.0
Tin Sn 0.002
Vanadium V 0.002
Zinc Zn 0.014

[Richard]

I have used them in the past. It is a Hiatt product. That description is incorrect though, well bs really. The blocks just slowly dissolve releasing calcium plus the trace elements. They will dissolve too quickly if placed in any current and Hiatt recommends you bury them in the sand.

It is calcium chloride which can give you problems if you use it alot in an unbalanced fashion therefore I don't use them. Decent product for small tanks or to use to raise calcium up to 400-450 and then start using a balnced additive.

[seamonkey2]

anything better Richard?

Jose

[Brett Wilson]

anything better?

Jose

Water changes and normal dosing (two part or kalk or whichever you normally use) IMO would be a better choice.