Take away the laws of physics, gravity, and money. Take away ALL maintanence we do on fish tanks. NO water changes, forget hormones they dont exist. Algae is a figment of your imagination. No such thing as poop, or ammonia, nitrites, nitrates, and fish get as big as you want them to be. PH, KH, Heavy metals, Overfeeding, hazardous chemicals, water parameters, etc all dont exist. glass is indestructable, nuclear proof, rodent proof, bullet proof, and unbreakable even with age. Take away the need for heaters. filters, lights, bacteria, eletrical contraptions, say they were unnecessary. Take away the lack of space in your house, say it suddenly expanded by a thousand times or more/less. say everything was FREE. say electricity is magic and there are no bills.
whats the first thing you would do in a world like this (fish related)? Like would you get a thousand 180's and stack them on top of each other and get an elevator installed? Or would you make an ocean with glass walls and all of your stocking preferances? Natural food chain, specimen only tanks, breeding pair of rtc, oscar, rays, pufferfish, eels, pleco, cichlids, catfish, bichir, gar, airapaima,etc, region specific tank, or just every single species of fish known to man in the same tank. Would you get fish tank floors? Would you create your own fish? How about a freshwater shark? Aquatic porquipine? Platypoise? Elephant? underwater roses? You dream it you got it!
Personally I would like a nice big aquarium. I dont want it too long, just long enough that I can See the whole tank from 1 view. I dont want to have to move around to see everything. I want it super wide, but not SOO wide that the fish become grains of sand 100 miles away. Something like 300 feet wide i guess. I want it tall, But leveled with my height, without the need for a ladder. I want a tank to feel like a public aquarium, but be private. I would like to be able to see it at all angles in different parts of the house. I think having about 3 feet diameter cylindrical tubes in every room of the house in plain view, all connected into 1 gigantic primary tank in the living room. Like a fish tank couch, bed, table, chair, floor, sink, toilet, misc bowls, all connected with the pipes which connect to the main unit. But still with the comfort, like a soft fuzzy, yet translucent couch, functioning seperate sink water, toilet, comftorable chairs, sturdy table, etc. And i would like 1 MILLION GUPPIES in the center. But in a huge tank so everybody has as much room as they would in the wild. I would like SOO many guppies, I could keep rtc, tsn, cuckoo catfish, and 25 giraffe catfish in the same tank on the bottom. With babies giraffe catfish swimming around too. A breeding pair per say. I would like a group of foot long medusa pleco breeding pairs with little babies on the glass moving and the parents hastily wading off intruders. I would like 2,000 yellow labs in 1 corner with lots of rockwork and the cuckoo catfish going crazy breeding. With a spawn happending every 6 hours like clockwork. Watching the cichlids practicing brood care, the female scooping up the eggs into her mouth and the male nudging the catfish out of the way. catfish babies in 1/3 of every holding females mouth. The guppies breed fast enough to withstand ANY predation their #'s magically come back in the blink of an eye adult size always at 1,000,000 guppies. In the other corner, I would like a planted tank. With discus, killifish, giraffe catfish, etc. The guppies inhabit every area of the tank. Dwarf shrimps cruising around in the java moss. I would like 1 victoria amazonica giant water lily in the center with 5 lily pads and 1 flower always in bloom. thousands of sword plants, java fern, anubias, jungle val, ludwigia 'red', and HC on the foreground. I would like a single breeding pair of datnoids. In the center of the tank I want a full grown redwood tree with java fern and anubias ALL OVER IT! Then at the top i want it to become a paudarium; halfwater and land. tree frogs and parakeets everywhere. Kitty Cats stalking mice in the bushes and pouncing with their pupils wide as the moon. Kittens learning to hunt with momma
. TOO MANY THINGS I WANT! 
whats the first thing you would do in a world like this (fish related)? Like would you get a thousand 180's and stack them on top of each other and get an elevator installed? Or would you make an ocean with glass walls and all of your stocking preferances? Natural food chain, specimen only tanks, breeding pair of rtc, oscar, rays, pufferfish, eels, pleco, cichlids, catfish, bichir, gar, airapaima,etc, region specific tank, or just every single species of fish known to man in the same tank. Would you get fish tank floors? Would you create your own fish? How about a freshwater shark? Aquatic porquipine? Platypoise? Elephant? underwater roses? You dream it you got it!
Personally I would like a nice big aquarium. I dont want it too long, just long enough that I can See the whole tank from 1 view. I dont want to have to move around to see everything. I want it super wide, but not SOO wide that the fish become grains of sand 100 miles away. Something like 300 feet wide i guess. I want it tall, But leveled with my height, without the need for a ladder. I want a tank to feel like a public aquarium, but be private. I would like to be able to see it at all angles in different parts of the house. I think having about 3 feet diameter cylindrical tubes in every room of the house in plain view, all connected into 1 gigantic primary tank in the living room. Like a fish tank couch, bed, table, chair, floor, sink, toilet, misc bowls, all connected with the pipes which connect to the main unit. But still with the comfort, like a soft fuzzy, yet translucent couch, functioning seperate sink water, toilet, comftorable chairs, sturdy table, etc. And i would like 1 MILLION GUPPIES in the center. But in a huge tank so everybody has as much room as they would in the wild. I would like SOO many guppies, I could keep rtc, tsn, cuckoo catfish, and 25 giraffe catfish in the same tank on the bottom. With babies giraffe catfish swimming around too. A breeding pair per say. I would like a group of foot long medusa pleco breeding pairs with little babies on the glass moving and the parents hastily wading off intruders. I would like 2,000 yellow labs in 1 corner with lots of rockwork and the cuckoo catfish going crazy breeding. With a spawn happending every 6 hours like clockwork. Watching the cichlids practicing brood care, the female scooping up the eggs into her mouth and the male nudging the catfish out of the way. catfish babies in 1/3 of every holding females mouth. The guppies breed fast enough to withstand ANY predation their #'s magically come back in the blink of an eye adult size always at 1,000,000 guppies. In the other corner, I would like a planted tank. With discus, killifish, giraffe catfish, etc. The guppies inhabit every area of the tank. Dwarf shrimps cruising around in the java moss. I would like 1 victoria amazonica giant water lily in the center with 5 lily pads and 1 flower always in bloom. thousands of sword plants, java fern, anubias, jungle val, ludwigia 'red', and HC on the foreground. I would like a single breeding pair of datnoids. In the center of the tank I want a full grown redwood tree with java fern and anubias ALL OVER IT! Then at the top i want it to become a paudarium; halfwater and land. tree frogs and parakeets everywhere. Kitty Cats stalking mice in the bushes and pouncing with their pupils wide as the moon. Kittens learning to hunt with momma