dangerflower Posted April 3, 2022 Share Posted April 3, 2022 I have a group of juvenile medaka that I added to my 10 gallon shrimp tank about a month ago. There are a dozen of them in there, which is too many for the tank size, but they are still small, and I was planning on moving some of them to my outdoor mini pond after they grow a bit more. They've been doing great, active and eating and growing. The tank is just barely heated at 68-70 degrees, planted, ph usually around 7.6-7.8, kh 2-3 dkh, gh between 5-7 dgh, no ammonia or nitrite, and I've been having to dose extra easy green to keep my nitrate levels at around 10 for the plants. This tank is struggling in a lot of ways, lots of algae and it seems generally unbalanced, so I do wonder what bad stuff might be going on in this water. I was checking on the tank this afternoon and noticed a raised white bump on the head of one of the little rice fish. I had vaguely noticed a spot of white coloration on this fish before, but these babies are still growing so their colors have been changing, and quite a few of them have some mottled coloration, so I never thought twice about it... until today when I noticed this spot is definitely raised. 😕 The fish is active and eating well, although it bullies its tank mates quite a bit. No other fish are showing any signs of illness at the moment. I did my best to get some pictures but this fish is little and fast. Are there other diseases that can manifest like this, like maybe a fungal infection? I would love any input about what might be going on and what to do about it. I've started researching how to treat columnaris and it does not seem like it's going to be easy with a planted tank and invertebrates 😫 Link to comment Share on other sites More sharing options...
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