RockMongler Posted March 29, 2021 Share Posted March 29, 2021 I have found an interesting issue in my tank late yesterday after doing a water change, specifically a cooler water change. One of my hillstream loaches (Beaufortia kweichowensis) suddenly appeared to have a fairly large wound on top of their head (was still red with blood when I first observed it a few hours after the water change), along with a moderate amount of fin damage. I have gotten the individual moved into a hospital tank (2.5 gallon kit from walmart, with small power filter and an air stone) with aquarium salt. However, I am kind of baffled as to what could have happened. My tank is populated by white cloud mountain minnows, a single otocinclus, 4 total hillstream loaches (one is now in the hospital tank), a fairly large number of red cherry shrimp, malaysian trumpet snails, bladder snails, and a small assemblage of things like detritus worms, planaria, and hydra. I am not entirely sure what could have caused the wounds (I haven't gotten a good chance with good lighting to get a good picture of the wounded individual). Nothing in particular is known to be super aggressive and mean. I'm not sure if it was a territorial spat between loaches or one of the whiteclouds getting nibbly. From what I've read, the loaches supposedly don't have the right kind of mouth to nibble on each other, and fights are normally just 'topping' where they scoot around and determine their pecking order. The white clouds have been a bit more rambunctious in their mating displays as of late, but that is almost entirely done in the middle of the water column, and it's usually just the males flaring their fins and looking intimidatingly at one another (though a few of the males do have nibble marks in their fins, but it's not always the easiest thing to spot). The otocinclus is usually super friendly, and i think has basically zero possibility of harming anything but algae and biofilm. The snails and shrimp I think are in a similar situation as the otocinclus; harmless to any of the major denizens of my tank. I wonder if the cooler water change (~65 F water into a ~72 F tank) just set off some slightly more aggressive tendencies related to spawning among my fish, and the one poor individual was in the wrong place at the wrong time, or if I should be more worried about returning them from the hospital tank to the main tank. Any thoughts? Link to comment Share on other sites More sharing options...
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