Why is my acan turning black???

[Morgan Rodgers]

Just was looking at my tank and decided to look at my acan and it was black on the inside I have had it for abt 8 months and never was it black.

 

[2021 reefer]

Just was looking at my tank and decided to look at my acan and it was black on the inside I have had it for abt 8 months and never was it black.

Maybe too much light. Same thing happened to my pectinia but it's fine now that I lowered par

 

[Morgan Rodgers]

Maybe too much light. Same thing happened to my pectinia but it's fine now that I lowered par

Not sure why it’s doing it now, hasn’t changed. Been the same since I got it, and that was like 6 months ago.

 

[2021 reefer]

Not sure why it’s doing it now, hasn’t changed. Been the same since I got it, and that was like 6 months ago.

Hm maybe it's just changing colour? Any swings in parameters

 

[Morgan Rodgers]

Hm maybe it's just changing colour? Any swings in parameters

Nope no swings just a little bit more like phosphates than normal like a very slight difference.

 

[2021 reefer]

Nope no swings just a little bit more like phosphates than normal like a very slight difference.

Not sure... but my pectinia was fine for 4 months with even higher light and then it started turning black and turned down the light. Could just be light or maybe it's just getting black colour?

 

[Morgan Rodgers]

Not sure... but my pectinia was fine for 4 months with even higher light and then it started turning black and turned down the light. Could just be light or maybe it's just getting black colour?

Should I just leave it for a few days and see what happens?

 

[old salt reefer]

I'll bet that it's not black- all that blue light makes it look black. Get a normal flashlight and look at it after the lights go out.

 

[Morgan Rodgers]

I'll bet that it's not black- all that blue light makes it look black. Get a normal flashlight and look at it after the lights go out.

Will do! Thank you all for the help!

 

[RichReef]

When mine started turning black I found my TM hydrometer was way off and my salinity was high. It was quite an ordeal going through different brands of hydrometers and refractometers until I found one that was actually accurate and I could trust.