Oh, this is beautiful!!
I'm in the long, slow process of getting things together for a large goldfish tank, and this is something to strive for! :)
Do you mind to give me the idiots guide to how your sump/filter is set up? I have NO IDEA what most of the terms mean, as I'm *just* starting to get educated about goldfish and larger tank filtration/sumps/what-have-you, but I'm always looking for information. :)
No pressure, as I know it's a lot to ask, and I completely understand if you're too busy, or if it's just too much information to post/write down. :)
Your tank is beautiful, and I love that you have it planted successfully! I'd read that it can be hard to plant a goldfish tank because they eat the plants, but this is lovely! Very zen quality with the minimal décor but it really packs a punch visually. :)