cheap source of mineral mix ?

[raglanroad]

To make an RO water remineralizing mix, these are commonly used: calcium chloride, calcium sulphate, and magnesium sulphate. Where do you buy the first two?

and does anyone use powdered calcium carbonates for mineral mix?

[billeagan]

Wouldn't it be cheaper to buy equilibrium??

[brewmaster15]

calcium chloride is easily obtainable...its sold at stores like home depot as an ice melting agent...get the pure stuff.. pellet. better still , though probably not any different..
its sold at livestock supply houses like Agway in the USA as a calcium suppliment for cattle ..usually comes as a flake.

store very well..it absorbs moisture and clumps like a rock in a damp fish room:)

Calcium sulphate aka gypsum is also a feed additive for livestock.

I use calcium carbonates in nylon stockings to prevent pH crashes ..not for ro minerals

hth,
al

[raglanroad]

Wouldn't it be cheaper to buy equilibrium?? I have used it, but I added sodium chloride, and it is still very low in calcium and magnesium.

it reads
potassium 18.9%
magnesium 4.3%
calcium 2.7%
iron 0.47%
manganese 0.08%

assuming it contains sulphates and other stuff not mentioned.

[raglanroad]

Thanks Al.
Time to reduce costs on brand name mixes that seem pretty far from the main chemical compostion of river water in general.