Well ... I switched from IO to Biosea Marine mix ... I had other changes going on so I cant be certain that the salt was the cause of my problems, but probably had something to do with it.

My problem is that I didn't make any change slowly .... which I believe is the key .... You have to "acclimate" your tank to the new salt.

There are many good salts ... you just have to fine tune them with supplimentation afterwards. As long as you are doing regular water changes, Magnesuim and other trace element problems should not arise and keepng calcium up with a 2 part additive is a good way to go ... depending on the size of your tank (it can be costly on larger tanks and your bioload of corals is obviously a factor as well). I used Kent's Turbo Calcium and it did a great job for me ... problem is ... most of the time you need more than what is recommended, so if you are having low calcium issues just slowly increase the dose until you see the calcium start to come up. If that doesn't work .. then it is time to explore other issues that may be causing the problem ... like Magenesium.

I think the only supplimentation that is needed for successful reefkeeping is:

1 ... regular water changes ... that is a suppliment as well people ;) the most important one at that.
2 ... ph/Alk buffering
3 ... Calcium

Forget all the trace supplimentation ... your salt has all of that in it. If you are doing regular water changes, there is no need to waste the money on all the trace additives that you can't even test for :o I bet people contaminate their tanks with trace supplimentation more than they think.

Keep it simple ... let the salt work for you ;)