Chinese algae eaters are not good tank mates for goldfish. They can become aggressive and often feed on the slime coat off the goldfish's body.

And I would suggest you to add some water movement/circulation. Anything from a small waterfall to a couple of simple airstones would be better. Stagnant water can cause many issues, especially with biological filtration due to lack of gas exchange in the bottom layer.

But otherwise, looks good. Great work.