10-18-2011, 10:55 AM
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It doesn't really look like a fungus from the picture you posted, so those meds might not have been helping. It can take them a week to start really making a difference though, so don't rule them out after a day or two.
You've had him in that tank for 8 months? After that long with a filter and a fish, your tank should be cycled. It's not. What your test results will read when it's cycled is 0 for ammonia and nitrite, and >10 for nitrate. This will make a big difference in the balance in your tank and the quality for your fish. I'm not sure why it's not cycled,
I see you have a little nano heater in there - do you have a thermometer? They're very cheap (less than $2, most places), so if you don't have one you might want to get one. Those heaters aren't terribly reliable as you can't set a temperature (I have one in my betta tank, the temp ranges about 6 degrees depending on the time of day).
If I were you, I would do a 50% water change DAILY and add 1 tsp of aquarium salt to start (1/2 tsp daily with the water changes afterwards) for at least a week, 2 wuld be better, and see if that makes a difference. I have a feeling his water conditions are what's causing him to act like this. Hopefully, once he is looking healthier and is more active, you can get your tank cycled so you won't have to worry about it as much. There are plenty of threads about cycling on this forum, or you could start a new one.