hi,
i need some help please,
last week wedensday i bought 2 cory sterbai for my tank. the corys seemed very small, i introduced them to the tank, other fish i have is 6 platys, 6 danios, 1 guppy and 1 molly, 65ltr tank. the fish were fine when put in but did not move around a lot, mainy hiding in the cave and ornament. i feed flakes, sinking small pellets and tried frozen bloodworms. i could not seen them eat but they were "hoovering" the gravel. i bought another 2 corys from another store 2 days ago as i thought they might lack company, the new 2 corys are twice the size and very lively. all 4 of them hanging around together.
yesterday, one of the smaller corys died, no particular reason i could see, this morning, one of the big cories was lying dead in the tank, looked normal. when my husband came home today, the other bigger cory was swimming upside down and breathing very heavily. tried to get up but kept on falling to the ground (if that makes sense), then it was floating like dead again. he fished it out and it is in a bowl and seems to do better.
i checked the water, api master test kit - amnonia - 0, nitrite 0, nitrate between 5and10, currently kept at 26 degrees celcius.
what can be the cause? i have gravel in the tank, the mouth of the fish seem fine, i am worried that the gravel might be too sharp but i checked with the stores first and they said gravel is fine. are sterbais more sensitive than my other fish as no problems with the other fish at all.
what can i do? i don't want them to die and only want the best for the fish? is the water too warm for them? the one is the bowl seems to recover but no heater so the temp is dropping. but i am worried to put him back in, i cannot see any picking or bullying in the tank.
i need some help please,
last week wedensday i bought 2 cory sterbai for my tank. the corys seemed very small, i introduced them to the tank, other fish i have is 6 platys, 6 danios, 1 guppy and 1 molly, 65ltr tank. the fish were fine when put in but did not move around a lot, mainy hiding in the cave and ornament. i feed flakes, sinking small pellets and tried frozen bloodworms. i could not seen them eat but they were "hoovering" the gravel. i bought another 2 corys from another store 2 days ago as i thought they might lack company, the new 2 corys are twice the size and very lively. all 4 of them hanging around together.
yesterday, one of the smaller corys died, no particular reason i could see, this morning, one of the big cories was lying dead in the tank, looked normal. when my husband came home today, the other bigger cory was swimming upside down and breathing very heavily. tried to get up but kept on falling to the ground (if that makes sense), then it was floating like dead again. he fished it out and it is in a bowl and seems to do better.
i checked the water, api master test kit - amnonia - 0, nitrite 0, nitrate between 5and10, currently kept at 26 degrees celcius.
what can be the cause? i have gravel in the tank, the mouth of the fish seem fine, i am worried that the gravel might be too sharp but i checked with the stores first and they said gravel is fine. are sterbais more sensitive than my other fish as no problems with the other fish at all.
what can i do? i don't want them to die and only want the best for the fish? is the water too warm for them? the one is the bowl seems to recover but no heater so the temp is dropping. but i am worried to put him back in, i cannot see any picking or bullying in the tank.
