Hey Kel, How big is Sketti? I looked back & realized that you said you've had him for two years in a bowl,then a 3 gal. tank.It won't take long to figure out on here(the forum) that Sketti is tough just for living like that for two years. Man do you have some reading ahead of you!

There's so much to tell you .... Kel,Goldfish have the capabilities of getting 10 inches or bigger.They are probably one of the dirtiest,but most lovable fish you could have chosen though.

Because of their major waste producing,& the size they can grow,it's recommended to keep them in at least 10 gals. of water per fish. A good filter is also needed.Recommended size is something that filter's10 X's the size of the tank that you're keeping the goldfish in,so a ten gal. tank would need a filter with a gph(gallons per hour) of at least 100. You have kept Sketti in a bowl,and then a 3gal. tank. You mentioned that you partially change Sketti's water every 1-2 weeks.Because of the massive waste that Goldies produce.Sketti probably needed his water changed daily while in the bowl,and probably every other day while in the tank.Even though he's not got the typical white edges on his fins,he's showing signs of poor water quality. I know that this is soooooo much to take in,so I'm going to advise you to read a few articles,or people will think that I'm writing a book here.

I want you to go to the Home page and find a) 10 healthy steps to take care of a goldie,

cycling a tank,and read over them when you get a minute. Have you ever used Aquarium salt in Sketti's water? You may want to pick some up at your LFS. Sketti is probably feeling a little under the weather,and also stressing from the new tank and filter. Using the salt sometimes eases some of their stress,and also aids in some sickness's. Talk to me Kel,tell me what you're thinking about now.....