Mag sulfate or Mag Chloride?

[MarlinHooker]

Trying to understand if there is a real difference between using one or the other for dosing Mag. I do regular weekly water changes of 10%. I've read Randy's article about Mag supplementation and if I understood it Mag sulfate is ok if you do regular waters changes ...?

[disc1]

I think you've read correctly.

[rayjay]

It's not as good as using 10 parts magnesium chloride hexahydrate to one part epsom but for most tanks using small amount of epsom probably shouldn't hurt.

[MarlinHooker]

Are there any particular brands of Epsom salts to stay away from? Is there one "better' than others?

[MarlinHooker]

I assume this is ok?

http://www.cvs.com/shop/product-detail/CVS-Epsom-Salt-100-Natural-Mineral?skuId=305728&WT.mc_id=Shopping_Google_PLA

it's 3 times cheaper than buying from a LFS ...

[rayjay]

Probably yes. I haven't found any epsom salts that I couldn't use.
I buy mine from Walmart in 4L containers.

[MarlinHooker]

ok, the local CVS sells it for a little more than on-line ($7.50/6lbs) but that is still a lot cheaper than the $12/gal it costs from the LFS at $3/lb for MgSuf

[bertoni]

I always used drugstore epsom salts. Any USP product should be okay.

[MarlinHooker]

Thx, I picked up a couple of bags from cvs yesterday ...