I have a 20 gal
unplanted tank with included lighting and a aquaclear 30 filter, which i just installed about 2 weeks ago. Yesterday afternoon I removed the light fixture for about 2 hours to install some LED
moonlights. Ever since putting the light back on my 3 odessa barbs have been acting strangely. They are normally a very bright red color (although they lose their color at night) and they always swim around the middle/ top of the tank, chasing each other, etc. But since yesterday they are almost completely white (the way they look at night) and they hide around the bottom of the tank, in rocks, and are *very* twitchy. Every time I walk by the tank they all flip out & try hide themselves as much as possible, they are very easily startled & dart around the rocks, etc... They usually swim up to the surface hoping to be fed. I thought maybe taking the light away for a couple hours just confused them, but after more than a day the situation is the same.
Water params are all normal, and the other fish in the tank act normal-- except for my rainbow shark, who hides more because he doesn't have to bother chasing the barbs away from his cave any more.
Can anyone tell me what might be going on with the barbs? Could they be mating or something? I have read that strange things can bring on mating in some fish.
In the tank I have the 3 odessa barbs, 3 hatchetfish, 1 red tail shark, 1 snail & 1 adf
Thanks a lot