I’d paint the wood surround the color of your trim work in the rest of the room and remove the blue vase with dried flowers from the mantle. It’s too tall. Find something shorter, like a pretty piece of pottery.

There's not much you can do decor-wise to compete with an aquarium lol. Try blue mantle objects first, that may be enough. I actually like the blue jug but no flowers.Paint the candlesticks the same blue. If that's not enough, add more blue objects and paint fp surround to neutralize it. These blue accents with the neutral mantle will then draw the eye away from the fish. Keep the neutral painting.
This is a concept. Skip the wreath. NO dried flowers.

Thank you. I know that’s my husbands fish tank. I hate it lol.

I meant to say paint the fireplace surround to match the trim as proposed by @Lynzy so it doesn't look like a matched set with the aquarium lol.

P.S. There is NOTHING wrong with keeping fish as a hobby.

Hm…..I think you’re going to get lots of differing opinions here! I, for one, don’t think it’s a bad look with the rest of what we can see in the photos, and the wood actually looks good with the fish tank. Unless you’re going to update the surroundings areas, I’d leave it as is. (Maybe minus the blue vase😉)

I'd probably like having green from aquarium in my art - just ideas:

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@coray If I were to keep the mantle and surround wood, I'd paint the wood aquarium stand, too matchy matchy. A lot of people wouldn't want to paint a beautiful wood fireplace so I understand.

I'm not sure what your question is, but I think the fireplace is nice the way it is. I like the wood mantel/surround and the brick. What I would do is remove the vases from the mantel, and also replace the wall to wall carpeting with an area rug. Hopefully you have hardwood floors under the carpet.

Also, I see a sofa in one of the photos--where is that in relation to the fireplace? Usually a fireplace is a focal point, with a seating area in front of it.

Like I said: you ask 10 people for their opinion, you will get 11 opinions!

“What I would do is remove the vases from the mantel…”

Exactly my thought since I prefer simple with mantels. Just the art would be lovely.

I would remove all the wall decor from that end of the room except for the painting over the FP. Then I would find some gold candlesticks that repeat the color in the painting and put them on the right side of the mantel. Sprinkle more gold accessories throughout the room.

I would paint the fish tank the wall color. Leave the fireplace but use objects on the mantel that coordinate with your brick , not the rest of the room . Remove the object above the fish tank. Simply you don’t need something on a wall just because there is space. Remove the blue rug.

Here’s 1 angle

Here’s another

Here’s another

Here’s another

I saw your other post and now I finally see the whole room, the the entertainment center and clock. So the mantle and fish stand aren't the only matching wood and it makes more sense.

The Fireplace and that cute blue side chair in the corner both look lonely. Let them be friends. Move the chair to the fireplace at that same angle so it's directly facing the fire. Move the console table closer to where the chair was. Voila. Cozy.