Help: sps bleaching W/Pics

[franklypre]

I know lack of nutrients this looks more like alk swings. Are you carbon dosing(sugar/vinegar/vodka)?

 

[Reloadeddevil]

I know lack of nutrients this looks more like alk swings. Are you carbon dosing(sugar/vinegar/vodka)?

No carbon dosing at all. Just WC biweekly.

 

[Ecvernon]

I thought there would be something with your test kits. Salifert calcium chart only goes up to 500 and magnesium only goes up to 1500.you would have to add a bit more of each reagent to get to those test results. In order to maintain your high numbers your alkalinity theoretically would have to be much higher. I think that confirming your results at a LFS or a Friends test kit would be a good idea. Also if you are using reef crystals and those are the levels after a water change you may have a bad batch. for me reef crystal mixes at 35ppt with 400-420calcium alkalinity 10-11dkh and 1400-1420 magnesium.

When I was using a Hannah checker for my alkalinity I was shooting for an alkalinity of 7-8. The checker reads lower than it was supposed to. My sps corals was not happy. When I took measures to correct the alkalinity ( through water changes and dosing) my corals started to look like your pictures did.

I really hope you get to the bottom of this.

 

[mic209]

Also if you are using reef crystals and those are the levels after a water change you may have a bad batch. for me reef crystal mixes at 35ppt with 400-420calcium alkalinity 10-11dkh and 1400-1420 magnesium.
QUOTE]

I suspect that he is mixing his salt way above 1.026 and that is why his calcium and mag readings are so high. I had the same problem with high mag and calcium with red sea coral pro salt, turns out my calibration fluid for my refractometer went bad and I was mixng my water to 1.032. After getting new calibration fluid, my new saltwater mixed within the range that red sea specifies.