Perhaps someone should call the LFS and advise to pull the other buckets if any. Two tanks with the same symptoms and same batch is more than a coincidence.

That's weird as the RC thread is from January 2011.

those numbers are not the batch number.
those numbers just mean reef crystal salt 160 gallon in a 5 gallon bucket.
i have the 200 gallon boxes and the batch number is on each bag.
as i look threw all my buckets of reef crystal salt and i have no clue where the buckets keep the batch number.
i dont know if this info helps. ill try calling instance ocean and ask where to find it on the buckets.

Didnt think that was the batch # as all my empty buckets have the same #.....i just mixed up 45 gallons for a wc. glad i didnt use it yet....nervous now!

+1 when I crashed from bad Kent carbon, they hooked me up good with an rodi, aquadoser (drips system) and a few other randoms. All i had to do was report the batch number with before and after pics.

From RC:
The RC1 number was what I searched the internet for, but the other two numbers are the same on both buckets (minus the leading and end zeros in JMes' numbers).

I'd say they're the same . . . unless there is another number on the buckets somewhere that is relevant?

the same number is on my bucket at home and its almost empty.. ive had no problems..

Whoa... So sorry for your loss James I can only imagine how painful that must be. Do you still have the bucket, from the RC thread he noticed a change in the bucket plastic, perhaps this caused the problem? Either way I would be contacting Reef Crystals, I hope they give you some credit here.

I got a batch of RC a month or two ago and have just recently started using it. I've maybe done 3 WC with the new batch. Ever since making the switch things haven't been right in the tank. I've had a couple SPS colonies crap out and I've been having weird cyano and algae outbreaks that I've never seem before. Nothing else has changed except for the salt. I was wondering this weekend if there was something up with the salt, especially after the last WC and there was a weird sediment left behind the in the mixing bucket.

That's weird my last bucket left sediment as well. Like a hard white almost calcium substance. This new one is fine so far, still haven't checked the batch though.