Matt;

NO NEED TO YELL! We can hear you with lower case letters. :-D

Here's my advice, others may differ:

Step 1: After doing a big water change, run some carbon in a canister under some pressure and put a polyfilter in your tank drain. This will remove most of the stuff that's hurting your livestock.

Step 2: Throw strontium and iodine supplements in trash. Dispose of trash responsibly.

Step 3: Don't buy anymore "supplements", more accurately, toxins. You can easily accumulate way more than NSW levels of these and other metals just by feeding your fish and using most commercial salt mixes. The only thing you need to add to your tank is calcium and carbonate, easily done with kalkwasser or a 2 part balanced calcium additive.

Step 4. Your skimmer will remove some toxic metals ("supplements") but you should hardly worry about it; in fact, you should be happy. Analysis of skimmer sludge shows that it contains a significant amount of lead, mercury, phosphates, etc. This is a good thing.

Step 5: Read some articles by Eric Borneman and Ron Shimek on the topic of "trace elements". You'll quickly find that there is absolutely no evidence whatsover that marine animals need this gunk in the water to thrive. You'll also find that in 99% of aquariums, we already have way more than NSW levels, at least unpolluted NSW. I guess you can't blame the aquarium companies for trying; they got to make a living too!

Good luck

Matt