So my koi has 1 white pimple like spot on his tail. He shows no sign of sickness such as scratching, darting, lethargy, gasping or anything. He is still eating fine as well. I noticed the spot tonight. He did not have this spot two days ago. I'm wondering if this could be the start of ich or bacterial infection of some sort. There are no red streaks or damage to his fins. All his scales look good. Just this one daunting white spot. Any ideas what this is?
* the size and stocking density of your pond,
120 gallon show tank......koi is very small .....yes we are going to build him a pond
* the type of filtration you have,
Canister filter that filters 265 gallon per hour
* your maintenance routine, and
* the last time you performed maintenance.
I did a 25 % water change this week.....new aquarium just cycled so only one change has been done. I normally do my water changes in response to water parameters.
* They also need to your water parameters, including the temperature.
Temp is 74 degrees. Ammonia is between 0 and 0.2. Nitrite 0. Nitrate 5ppm. Ph 7.8.
* The last time you added a new fish.
He lives with 1 small Miranda which I added to the old tank about 2 months ago. The new tank has these two and some feeder fish.