I would like to be able to repeat the shim cheong's miraculous fish tank quest. If it takes 4 weeks to craft 1, this means it would allow you to get up to 13 tanks per year...

now most ppl wont be chasing this because most dont active fish or underwater gather. but for those interested...  we would be able to not discard those green and grey fishes...

we could have a lot more room to load up lobsters/clams/etc.. from gathering underwater... and active hotspot/triple float fishers wouldnt have to go back and forth as much if they just spend the time to get a couple more fish tanks.... It would help boost profits of those gatherers and fishers, they dont make crazy money and probably still wouldnt after, but it'd at least help boost it for putting in the time and work... It would also give us traders something different to do to help get some of that harder to gain trade exp... and even though it would be possible to get 192 fish tanks.. it wouldnt be realistic.... also because to fill that many would take so long that the fishes inside would actually start to expire. afk fishers wouldnt need that many... and to get that many would take literally years....so how about it? why not allow us to get multiple fish tanks? it could be awesome!

pearl fish tank ?

Or and hear me out on this, they should buff hot spot fishing to make 800.000.000 like how bartering does since now I can stay 3h-5h and barely make 300 million

Just develop some way to increase the inventory slots in the tank and be done with it. Having multiple tanks would be a bad design in inventory management, especially since PA plans to finally simplify inventory management by making more items stack (30 Kama blessings sitting in Eilton storage agree).