Polyps are shriveled up

[Saltwada]

Hi everyone! i was wondering if i can get some advice/help with my coral. So idk why but only polyps in the tank are shriveled up and all other corals are fine. i did a 25 percent water change and its still the same. My parameters are:

Phosphate .02
Nitrates .10
ammonia 0
nitrite 0
ph 8.2
calcium 410
alk 9 dkh
mag 1250
salinity 1.024
temp 78

any ideas on what it can be?

 

[Uncle99]

Nitrates way too low at .1 and this would be out of balance with phosphate.
Nitrates should be in the 2-10ppm range, and phosphate should be in the 0.03-.1 range.

 

[Saltwada]

Nitrates way too low at .1 and this would be out of balance with phosphate.
Nitrates should be in the 2-10ppm range, and phosphate should be in the 0.03-.1 range.

sorry i meant its 10 ppm
any ideas?

 

[Saltwada]

i wish people would respond. no one ever responds to em anymore

 

[Copingwithpods]

i wish people would respond. no one ever responds to em anymore

Hard to say what is causing as your parameters are in range. Phosphate and mag are a little low which might be the issue but it's hard to say for sure.

Take some pictures under whites only maybe we can see something irritating them pest wise.

 

[alex7miles]

Hi, could be pests. Have you noticed anything attacking them?. Uv torch at night ive found is a good way of seeing stuff you didnt know was there hope you get it sorted

 

[Chrille26]

Maby a fish or snail irritated the coral, has it been closed up for a long time? Sometimes my fish drop sand on the corals lower in the tank and snails and shrimp take shortcuts across them when looking for food.