I've never had Ca go below 400 using Kent for the past four years . (Salifert)...?

It measures out about 420 when freshly mixed.

Steve s, that chart you linked to is the republished S-15 report, strangely enough with out the Aquacraft stuff on there. I got an email back from Kent today and the scientist assures me that the concentration of copper in Kent salts is very very close to that of NSW, a slight variation between batches will be obvious but NEVER 50 times that of NSW. The scientist at Kent feels that at a concentration that hi, inverts would suffer and most likey die over a short period of time.

Emily, I'm convinced that hobby grade test kits just don't cut the mustard.
Which is best... I'm just not sure.

Just in case you guys haven't seen this yet, could be interesting.

http://reefs.org/phpBB2/viewtopic.php?t=27367

could be interesting Emily, could be scarey too..... have to see.

Seems overkill. They should test the most popular and controversial salts first. If they have money left over, then test the less known salts.

I tend to agree with you on the copper concentrations... If they where to be that high, keeping inverts would be quite hard. I have many differnt types and have no problems with them.

The link to Reefs.org sounds interesting. I also find what was mentioned about the two other salts and the results posted also kinda fishy..('scuse the pun)

Cheers
Steve

BCO-Guy,

I'm pretty sure Dr. Ron showed that this was in fact what happened with the IO & Coralife salts tested. And that the Crystal Sea kept the Urchin embyro's alive in similar #'s to NSW

This is from his report:
:o and I've used IO for hmmmm.....25yrs
Gazza

Gazza like I said, the Kent scientists say there is no way there is even close to that copper concentration in their salt, it is close to NSW.

I have not read Dr. Rons work so I can't comment on it.

I hope my post doesn't come across that I'm slandering IO or Kent. I've used both mixes and I'm sure I've purchased truckloads of IO over the years. Ive toured their clown rearing facility in Florida (now closed) and have been happy with their products so far. But their clownfish if I remember had some problems and one wonders if this was part of the problem. Time will tell, and I'm sure we've not heard the end of this. Meanwhile I'm going with Crystal sea.......a closer match to NSW :D