Corals dying

I've been having a problem with my corals dying and/or not looking so good. I have a 200 total volume, all parameters that I could test are ok - nitrates nitrites ammonia calcium and alkalinity magnesium iron and potassium. Phosphates were a little high (.08) and iodine was low (.3). I have sps, lps, zoas and mushroom and they're all being effected. I'm running Rox, skimming the heck out of my tank and temperature is right on. The only thing I haven't checked is my lights that I have had for 3+ years (ai vegas) (I don't have a par meter). Not all, but 80% of my corals are closed if not slowly fading away. Zoos closed and brown junk on them, monti going white and lps either completely sucked in or actually falling apart. There has been a tiny amount of diatom bloom, but nothing close to being a pandemic. Please let me know if anyone could help - I'd appreciate it =D

My pictures are horrible. But calc was 460, alk 9.2, mag 1400+, nitrates 10, ammonia 0, nitrites 0, iodine .3, potassium can't remember, iron can't remember

How do you test for heavy metals? And what type of metals would cause this?

Any cleaning crew dieing off?

And I put in some prime to help with the metals

Have you checked for any electricity in the water?

I woke up this morning and my monti ports are getting white patches all over them, heads of euphelias are melting and my zoas that I had just peroxide dipped are almost covered in brown crap again

It's a very bad picture but it's the only one I could get showing the blotching - the blue spots are actually white

Edited by Fishflop - May 24 2015 at 2:21pm

If you left a rotor blade inside the tank to rust and dissolve, then yes, that could cause your corals to react badly.

But if you mean you just used a razor blade to scrape the glass, and then promptly removed it..?

Then, no, that would not harm your tank.

Activated carbon does not remove metallic compounds so if the water has copper, lead, arsenic, etc they are still there, causing issues. A rusty razor blade rusting in the tank might assist in the deaths you are describing, yet pure Iron oxide (rust) is actually not too harmful. We use a specially formulated rust (Granulated Ferric Oxide) to remove Phosphate.