Please take a look at my aquarium, thx.

Hello!
I noticed a couple of things I would do if that was my tank.
1) How about a background of some kind taped to the back of the tank? This could be simple black or a color, or one of those posters you can get at your local fish store. On my 10-gallon, I cut a piece of vinyl yellow table cloth I don't use anymore and put it on the back. Some people crumple up tinfoil and then straighten it out and use it.
2) You don't seem to have a light. You can use one of those cheap little desk lights with the flexible stem. Put a screw-in flourescent bulb of minimal wattage. Leave it on about 8 hours a day or so.
3) Everybody has their own tastes in tank decorations. You want balance, lots of swimming room, and some sort of color theme. I like the idea that if you know you aren't going with real plants, and you're using blue gravel, then don't even try to make stuff look "real". Go spacey with those neon color plants. If you have fish that like to hide, make sure there is a 'cave' of some kind.
Have fun!

Welcome to Aquaria Central!

As Winnie said, background are always nice. Do you have any kind of covering on it (a piece of glass that can't be seen)? Because I think a tank looks more like a seamless picture when the water level is right to the rim... but of course if there's no covering you might want to keep it lower.

First of all, I would be remiss if I didn't ask if your tank is fully cycled? You will probably need to do something about swimming space soon, as your goldfish will become overcrowded as they gain some size. These goldfishes can get quite large and they grow quite quickly. I have a lone ordinary comet in a 33 gallon that is about 6 inches (without the tail)...a 10 wouldn't suit your fish's needs for long.

As Winnie has suggested, I think a light would be a prudent addition to your set-up. Whether it's a canopy or a desk lamp, it's up to you. Make sure the light is shining down from above the tank to prevent your fish from swimming at an awkward angle.

What filter are you using? Looks like a Tetra Whisper? I can tell you that goldfish are very messy fish, and they contribute tremendously to the nitrogen cycle as waste producers. I subscribe to the practise of filtration redundancy. I would upgrade to a larger filter, or add another small power filter. As a result, not only will your tank look cleaner, you will always have a back-up filter in case one of your filters fails.

What is your maintenance routine (eg. How frequently do you do water changes? How much water do you change? Feeding schedule, types of food)?

And welcome to the Bowl, hihello!

I must agree with Rometiklan above. I had a single black moor in a 10 gallon tank and that was not enough for him. I had two filters working on it and couldn't get the water clean. I had him for well over 2 years and finally had to get rid of him. Those guys grow fast and they grow big.

If I were you, I would go ahead and start making plans for setting up a 55 or so in the next 6 to 8 months if you plan on keeping all of them. If you only want to keep one or two you could probably go with a 30, just remember that with goldfish you need to over filter. If you see a filter that says it is for a 30 gallon tank, get the next one bigger. Either that or use two.

Welcome to the hobby and I hope you have a great experience and stay in it for a long time!!

BTW - the tank looks good, have fun and be creative!