Tiger barb, mouth open

PuppyFluffer

AC Members
Jan 9, 2008
844
0
16
east coast USA
The stats:
Newly fishless cycled 20 gallon tall tank.
Stocked Sunday - 4 days ago with 8 juvenile tiger barbs, about 3/4 inch long, one smaller.
Also two adult male platys moved out of a smaller tank.
AC 50 fliter
Flourite substrate, lightly planted with immature plants

Water params - API liquid test, all 0

All fish are eating well. Diet includes: frozen blood worms, Hikari micro pellets, flake food and Hikari algae wafers

I have one of the tiger barbs swimming around with his mouth open. His color and activity level is fine.

Any ideas what's up with him?
 
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