What is this??? Help.

Jaramillo_12

New member
Hello, Im somewhat new to saltwater / reefing ,8 months to be exact .

Everything so far has gone perfect , until one day i began noticing my polyps were closing without no aparent reason , all my parameters were in check .
Ive noticed some red stuff on my rocks & brown black tentacle like stuff on my sand and polyps, is this a parasite ? Hitchicker? Can this be the cause of my polyps being stresssed out ?
Additional info: All my rock is dry rock, my sand is from the store (Seachem) i didnt quarentine neither my fish or my corals ( yellow tang , clownfisn , kenya tree , polyps, hermit crabs, banded shrimp, condy anemone)
 

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Parameters.

Parameters.

Calcium, nitrite , nitrate , ammonia, alk.
I had never checked mg , and niether had dosed my tank with it.
The only mg traces come with my salt mix ( Premium reef salt OmegaSea)
 
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