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HI everyone, I'm new to this forum! Up till last night I had two gouramis - a three spot in a 10 gallon tank and a gold in a 2.5 gallon tank (I tried to put them together once but the gold attacked the three spot). The last few days I had been noticing that my three spot wasn't feeling too good (I had her for about a year and a half). She was just lying on the bottom of the tank, wouldn't (or couldn't) come up to eat, and every now and then she looked like she was trying to swim but would just kinda flutter a little bit then lay still again. I thought perhaps she was dying so I went ahead and flushed her. But I don't understand, she was fine last week. Last Saturday I had to clean the tank because a lot of algae had grown in it, and I thought perhaps the build up of the algae in the tank had done something to her, but I'm still confused. Now I have the gold in the 10 gallon and he's as chipper as can be. Is there a way to prevent algae from growing so dang fast aside from turning the light off every now and then?? Whenever I clean that tank it looks great but two days later I can already see new algae growing on the castles and gravel, and then eventually on the walls of the tank. It's really frustrating. If anyone has any suggestions, that would be great!