09-13-2012, 10:16 AM
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Originally Posted by Cehszar
Last sunday I found one of my Barbs dead, with no apparently cause, although, without knowing the water parameters, now I know the temp is 75°F, NH3 NH 4 is on 0 ppm, NO2 are in 5 ppm, NO3 5 ppm and pH 7.6. and still don't know why He died.
I use to keep the bubble wand open all the time in a low "speed"; however, today there was no bubbles in all day, at the end of the day I added 4 fishes more (green Barbs) and 4 live plants, about three hours after I noticed that one of the black mollies have a white stuff around both eyes and one of the Yoyo loach was laying on the gravel aside the Anubia. So I started the Melafix and returned to open only one of the 14" bubble wand (it's 4' tank), less than 30 minutes the Yoyo was swimming again, I have a large live stock 9 mollies, 6 zebra danios, 8 Barbs, 3 dwarf gouramies, 3 yoyo loaches and 1 CAE. in a 55 gal tank. The live plants are 1 Anubia barteri (nana), 1 Ludwigia arcuata, 1 Lilaeopsis brasiliensis and 1 Dracaena sanderiana.
NO2 (nitrites) reading you measured is toxic to fishes, and is probable contributer to death of the barb and possibly other's as well.
Water changes of fifty % once a day should lower the NO2 and keep other fishes from harm.