coral supplements

[JonathanMars]

So I just bought calcium,magnesium,stoneium(spell check), and iodine.

My question is...since I have purple up do I continue to put that with calcium too or just the calcium and the rest of the stuff

 

[carey]

Do you have a test kit for each of the supplements? i wouldnt recommend dosing anything you can't test for.

 

[mr_X]

i would stop using the purple up. i would also get test kits for all of those before adding them. you can really screw up a tank and kill corals blindly adding.
as far as a calcium additive goes, you can't just add calcium. your alkalinity will be effected as they sort of work with each other. this is why companies sell "2 part" additives, both a calcium and alkalinity supplement.
i have never added strontium or iodine to any of my tanks. if you use a reef grade salt, you shouldn't need to either.