Hello! I am afraid our koi may have bacterial infections. I have been researching and it sounds like the most common signs of bacterial infection in koi are white film on the fins and red soars and ulcers on the body and face. Our koi are showing both of these. We purchased 24 koi, 12 from each of two suppliers. One set of koi is in one tote, the other set were in another tote. I have been doing daily 50% water changes to keep the ammonia down and each setup has an AquaClear 50 filter running on it. One set of koi is perfectly fine, we haven’t lost any and they look to be in perfect health and active. The other set of koi though, 2 showed signs of red, inflamed sores on their sides, and we have lost 4 from that tote. When we pull out the dead ones, we have been putting them in plastic cups full of water while we carry them down to the woods to bury them, and white film has kinda floated off their fins. Speaking of their fins, their fins don’t look too good either. A bit ”sad” and sorta damaged looking. Does this sound like a bacterial infection and what do I need to treat it? My parents and I are on our way to our LFS right now, so I need help before we get there so I know what to buy!!!
Tank size: 50 Gallon Tote
tank age: 2 weeks (we didn’t get the chance to cycle it, i know it is awful)
pH: 7.5
ammonia: The ammonia is staying around 2 to 4 when I check it in the mornings, so I do daily water changes to bring it down
nitrite: 0
nitrate: 0
kH: ?
gH: 5
tank temp: 72 (room temp)
Fish Symptoms (include full description including lesion, color, location, fish behavior): Red sores, looks like the skin is being eaten away a bit, on the body, white film on their fins, their bodies feel slimy when I pick up the dead ones, and they get real lethargic the night before they die, then in the morning I find them sunk down to the bottom of the tote
Volume and Frequency of water changes: 50% water changes every day
Chemical Additives or Media in your tank: Prime and salt, Filter Media is a sponge, “ammonia remover” and activated carbon or whatever, it is what came with the filters
Tank inhabitants: Was 11x 4 to 7 inch butterfly koi, now it’s 7
Recent additions to your tank (living or decoration): N/A
Exposure to chemicals: Just the Prime
Digital photo (include if possible): I can get my mom to send me some from her phone
Tank size: 50 Gallon Tote
tank age: 2 weeks (we didn’t get the chance to cycle it, i know it is awful)
pH: 7.5
ammonia: The ammonia is staying around 2 to 4 when I check it in the mornings, so I do daily water changes to bring it down
nitrite: 0
nitrate: 0
kH: ?
gH: 5
tank temp: 72 (room temp)
Fish Symptoms (include full description including lesion, color, location, fish behavior): Red sores, looks like the skin is being eaten away a bit, on the body, white film on their fins, their bodies feel slimy when I pick up the dead ones, and they get real lethargic the night before they die, then in the morning I find them sunk down to the bottom of the tote
Volume and Frequency of water changes: 50% water changes every day
Chemical Additives or Media in your tank: Prime and salt, Filter Media is a sponge, “ammonia remover” and activated carbon or whatever, it is what came with the filters
Tank inhabitants: Was 11x 4 to 7 inch butterfly koi, now it’s 7
Recent additions to your tank (living or decoration): N/A
Exposure to chemicals: Just the Prime
Digital photo (include if possible): I can get my mom to send me some from her phone
