Clown with a pimple on its side

tzylak

Member
Last night I noticed a white spot on my O. clown. The spot is quite small, less than half a pin-head; say, .03 of an inch. It is closer to its tail than its side fin.
What is it???

Two pictures attached.

Fish: Ocellaris Clown, B&W Clown, Firefish Goby, 6-Line Wrasse, Scarlet Skunk Cleaner Shrimp, Fire Shrimp, Corral Banded Shrimp, Peppermint Shrimp, Bristle Worms and CUC.
Reef: 150 lb. Sand, 70 lb. Rock, Frog Spawn, Button Polyps, Mushrooms, Kenya Trees, Brain, Leather Toadstool, Cheato and several aiptasias. . . .
Tank: 50g hex with overflow, 20um sock filter, 23 gal sump with DSB, 2 return pumps, 3 in-tank circulators, 5 UH fluorescent, chiller 650, heater 150W, skimmer 65.
I got the tank on 7/18/2014 but it has been established for over 15 years!! -I added a larger sump after the "œroom" addition.
I do weekly water test and 5-10g changes.
pH 8.1, NH3 0, NO2 0, NO3 0-10, PO4 0, Ca 360-400, Alk6-8, 77-79F, sg 1.021-23
47 sec. video: www.dropbox.com/s/4rzehzt3k3e8tds/150208 Aquarium.wmv?dl=0
 

Attachments

  • Clown Pimple.jpg
    Clown Pimple.jpg
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  • Clown Pimple 2.jpg
    Clown Pimple 2.jpg
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The Clowns fins look pretty beat up. Is there anything in the tank that is picking on it? I see a sixline which IMO is worse than damsels in a small tank. He could be causing some of the damage.
 
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