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Help! Black And Yellow Crystals Appearing In Water


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:paiseh: Hi all reefers!

Something weird just happened in my tank like 2 hours ago, I saw quite a few small, black and some yellow crystals just appearing in my tank!

Ratio of black to yellow in terms of quantity is 9 : 1

Corals and fish seem normal...

But the black and yellow crystals are an eyesore and I was worried that overnight, disaster might happen?

Any one can tell me what that is?

Thanks guys!

Oh, some of my tank details

My tank specs:

1XFL zoomed 10k 12 hour lighting per day

1XFL zoomed actinic same

hang over filter(quite big), denitrate by seachem, chemipure

2 feet tank...those round front edges type

4 inch DSB

tank cycled for a month...now is 2 months+old

liverock 10+kg

some mushies, leathers, star polyps, tube worms...

fish inside:

puffer from brackish waters, yellow with black spots

purple dottyback

orange shrimp goby

scorpion blenny

3 clowns

1 cleaner shrimp

1 blood shrimp

2 camel shrimp

2 snails

2 bubble tip anemones

i think thats abt it

temp ard average of 26 degrees

SG 1.022-23

ammonia 0

nitrite 0.5

nitrate below 10

Ca 400ppm

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Hi ...thanks for the replies...

I checked...my bags holding filter media are tightly secured...

Only things, I have dosed are calcium and strontium...

The black and yellow particles sink to the sand bed, I have sucked most of them off, but I believe that they are still some in between the rocks...

Fish and corals look pretty alright today...normal...

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Check the chemipure bag again. It sounds like the black carbon and yellow resins found in the bag.

post-36-1093875548.jpg

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Check whether you might have overdosed calcium or scrontium? I'm just making a guess..the yellow and black crystals sound abit towards iron or iodine based.

Maybe there is some ionic imbalance in your water causing certain ions to precipitate out? :angel:

Always something more important than fish.

http://reefbuilders.com/2012/03/08/sps-pico-reef/

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Check whether you might have overdosed calcium or scrontium? I'm just making a guess..the yellow and black crystals sound abit towards iron or iodine based.

Maybe there is some ionic imbalance in your water causing certain ions to precipitate out? :angel:

Chemistry student?

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Scrontium sounds like a good material for balls. :rolleyes:

Iodide salts won't be precipitated in the saltwater tank. If it did, the water will be brown and everything will be dead and bleached white.

Iron maybe, not from ppt but from rust.

post-36-1093875548.jpg

Warning: Heavy handed moderator in operation. Threads and post are liable to be deleted or moved without prior notification.

Moderator's prerogative will be enforced.

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http://www.sgreefclub.com/forum/uploads/post-36-1073276974.gif post-36-1073276974.gif

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Scrontium sounds like a good material for balls. :rolleyes:

Iodide salts won't be precipitated in the saltwater tank. If it did, the water will be brown and everything will be dead and bleached white.

Iron maybe, not from ppt but from rust.

FuEL STUDIES chemistry...

Tanzy TEACHES chemistry... :rolleyes:

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yea Tanzy is the best teacher.During tests i can always call him and count on him to give me the answers :) .

But you are such a loooooser that you failed your test even cheating with the right answers.

post-11-1061365199.gif

post-36-1093875548.jpg

Warning: Heavy handed moderator in operation. Threads and post are liable to be deleted or moved without prior notification.

Moderator's prerogative will be enforced.

Any grievances or complains should be addressed to The Administrator.

http://www.sgreefclub.com/forum/uploads/post-36-1073276974.gif post-36-1073276974.gif

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But you are such a loooooser that you failed your test even cheating with the right answers.

post-11-1061365199.gif

I also dunno how i fail.. i think the section B i screwed up something. its a 20 mark test man.. screw up 2 questions behind and fail le.. :( the MCQ dunno why supposed to get all right man.. are u sure u werent so sleepy that u gave me wrong answers :P

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