For everyone who is concerned about the fish in the tank, i appreciate your concern and want to remind you that fish welfare is always one of my top priorities. I specifically chose this type of fish because they live their entire lives within one single coral and do not actively swim in the water column. I have also kept these fish for many years and already have 2 active breeding pairs which have previously featured on this channel.
In the paper linked below you can read about it but have also attached a direct quote here for you:

"gobies remain within the coral branches and do not leave their coral host"

https://onlinelibrary.wiley.com/doi/full/10.1002/ece3.10209

The fact that he said that he was a marine scientist at the start of the video gave me all the reason to trust him with how he chose the fish. I guess some people didn’t listen, idk. But I think this guy is really cool

People know nothing of the fish he chose for this tank😂and it SHOWS.

its a neat enclosure, but im frankly unsure about putting a fish in it

i like the idea👍🏻, i dont like putting fish in it☹️

I can see the corals growing over the diameter size of the top hole and not being able to work with it anymore but to break corals off to be able to clean the walls.

Cool idea tho 😅

Bro drives a GTI, likes 3d printing, fishkeeping, and microelectronics. My type of fella hahah

So cool, it will be epic once the corals grow out a bit, almost like a ship in a bottle situation... well done.
Reef in a front loader washing machine next? Or the microwave? If she wont let you have more aquariums, slowly convert the appliances.

I kind of like the visible hose that run to the larger tank. It has a steampunk science experiment/lab vibe to it

This is beautiful!!! I might end up doing something similar but as a “refugium” for my little tank

Yeah definitely would like to see it in a month. It's going to go perfectly to  plan.

How clever ☺️ It's looks awesome and you have done it in a way that it's going to thrive.

That looks so cool! 💙

9:18 - I thought how cool, a self serve fish store until you explained! 😂

Bro, this is SO sick! Also, genius idea keeping it hooked up to the main display. 😮‍💨👌🏻

Truly incredible.Very successful and creative!
Congratulations!

That’s sick as man! Great video!

I think it would be amazing to see a tank inside a tank especially a reef tank inside a freshwater tank! I don't know if it is possible or not, but would love to see it happen!

This is your best yet!!! So cool!

As a mechanical engineer and aquarium hobbyist I’m genuinely surprised I’ve not seen your channel before. Amazing tanks and great job on the parts and electronics! I would recommend learning fusion 360 over tinker cad. It’s fairly easy and very powerful. Looking forward to what you do in the future 👍