My betta was living in a 5 gallon tank with a heater and filter. I left for college and my mom didnt follow the instructions that i left her and I returned to a betta with severe fin rot. Since ive bee home it has gotten a little better, but i just got a new 10 gallon tank and i thought that might be better for him so that he can have more room. I filled it with the 5 gallons of water from his tank (it was fairly clean) and 5 gallons of fresh treated water. I used pea gravel as the substrate and it made the water pretty cloudy (i did rinse it throughly) after i let it sit for about an hour i went back into my room and found that the cup my beta was in was leaking and he had no water, so i panicked and threw him in the new tank. he sank to the bottom and was fine at first, but then layed on his side. i took him out and moved him to a cup filled with water from his old tank and he seams to be doing better. when should i put him in the new tank. im fairly sure that it will be cleared up in the morning and not cloudy anymore. Please help!!!!