Who tests their water-change mix?

[Delphinus]

I really strongly urge you guys to continue testing. Yes, it's good if you find yourself questioning why you do it, but trust me, it's happened to me 4 or 5 times now where a salt wasn't what it was before. The first time I lost over a thousand dollars worth of SPS. *Don't* let it happen to you!

I thought I learned my lesson and I never used that brand again but it happened at least 3 times since then each time with different "premium" based salts that everyone on the boards was ranting and raving about. "Oh it's so awesome!" No it's not awesome. It's a SALT. It's a commodity produced in tremendous bulk quantities and the onus is on you to protect your tank inhabitants. Test it test it test it test it test it!