I've had aquariums since I was 20. My first was built of scrap plastic I found at college. I kept a few guppies in there. Then, one day, I visited a department store with a fish area and was offended by all the dead fish in the tanks. The department manager was drunk. He asked if I wanted a job.
I should have said "no". It messed up my college work. But I was SO broke I accepted. I cleaned the tanks of dead fish for a few days, started changing the water, read up on fish a bit, and made other improvements.
The company fired the manager and the Assistant Manager was promoted. She saw what I was doing and asked me to do more. I set up display tanks, breeding tanks, and even a self-maintaining guppy tank in a 2 gallon "brandy snifter" (I stole it from elsewhere in the store).
I set up Betta breeding tanks, kept the regular tanks perfectly clean. And flunked out of college (I went back and aced all the classes later). I had a job and focussed on that. Bad decision but it made sense at the time. I was starving and sharing an bad apartment with 5 other guys at the time.
Sadly, the department store closed. The fish company offerred me a job as manager of their top store location, but I didn't want to move to New Jersey. I left .
But I've always had an aquarium or two. 50 years of fish that come and go in their short lifespans. I have sometimes become too casual about them. I'm down to a couple corydorus, a red-tail shark, an algae-eater, 1 tiger barb and a dwarf gourami.
But I have a glorious amount of live anachris plants so the water is good. Time to replenish the tank.
I want high fin red minor tetras, cherry barbs, and swordtails.
So I went to Petsmart 2 days ago. They had fish on sale. I wait for sales; I'm sensibly cheap. If waiting a few weeks gets me something I want for less, why not wait. The freshwater fish only live a few years at best anyway.
I got 5 highfin red minor tetras and 2 painted platys. They were sold out on the swordtails. And apparently no one sells cherry barbs anymore. Which seems odd because even *I* have bred them (decades ago), but who knows the economics of breeding small fish for sale...
I just like to see something moving around in the aquarium. And they give me something easy to be responsible for...
If you are worried that my hobby is depleting the natural population, my understanding is that these small community fish are bred and raised commercially en masse. I would stop buying them otherwise. Just saying...