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Originally Posted by yeemiau
Use 0.5% salinity water as pre-caution step (100% water change). Have you been feeding bloodworm? When was you last water change? Any predator around your place? During last water change, did you adjust temp before placing the fish in?
They group at airstone as you said; lying on floor of floating in middle?
4" water depth is ok.
during the time you split the fish. Did you chase the fish a lot with net/hand? It sound the fish is a little stressed up. Space is ok but you can reduce it by using a smaller tub (Quarantine use type) to prove your theory on space, it worth a try. When fish eating happily and sudden change like this means something is wrong along the way. Handling these fish need to be a little more gentle.
Stop feeding for a couple of days and observe any changes. Let me know the outcome please. Thanks
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i didn't feed blood worm lately ,onli Masu and Ayu.My friend took on monday night ,oledi passed 4 days.the problem happen the 2nd days after they been reduced in number.I change water on sunday..shouldn't be problem i guess.
after observed quite some time ,i found out that they just look in the panic situation .just try my luck feed some food little far from them ,after 5 minutes didn't touch any food so i moved the air stone near the food ,onli some fish eat and all the pellet washes out from the air stone section.suck out all the remain food and took the air stone out of the water ,they run all over the tank in the panic form.onli when air stone put back in place,they slowly come near the air stone.
will add 0.5 % salinity and do some division on the tank .see how it goes.thanks.