Maintaining one or more tanks needs time and effort. But to most aquarists it's just a routine.
Every aquarist deals with water changes, scrubbing the algae from the glass pane, filter cleaning, feeding the fish and check the water parameters. I won't say how to do it for it depends on multiple factors how high the frequency should be. And to most aquarists those parameters within this routine is known by themselves. You just can not compare every tank with content with eachother.
But maintenance means in general also purchasing supplies to get the job done...
Me as being a keeper and breeder has to deal with another routine. And that's culling or selecting young fish on sex and traits. In almost every generation some culling or selecting is in place if you breed in a serious way. How pure of breeding a specific species or strain might be, there's always a percentage (low, average or high) that won't meet up the traits or characteristics of their strain/species sufficiently. To ensure a good quality of a line, culling or selecting is in place in my opinion.
The word "culling" sounds a bit harsh but culling is just a way of selecting and nothing else. But a lot of people associate culling with killing those fish. But that doesn't have to be the deal. To me culling means seperating the ones that won't meet up my createria. Those that will be culled, end up in a mutt tank where they may crossbreed. That doesn't mean that culled fish are ugly or sick fish. Not at all, they can even be the beauty you've ever searched for but they just won't be used for further linebreeding with the lines I'm keeping.
No matter if you're just selecting or really culling, all fish will be put in smaller containers to make the selecting easier. It does take time but I don't mind.
But sometimes I also make it more easier and taking my time with a bucket full of fish, a little scoop and a fishnet on a small stool. Really relaxed...
On a frequent bases I do check out my fish if everything is okay. I can do that by checking them out in a smaller container, using a sugar spoon or by using my hand to the glass. In some way, those fish let me do that without any problems.
This is avery good way of checking your fish. But be sure that you've got clean hands without a soap film on your hands.
From time to time I also have to scoop newborns or very young fry out of the breeding tanks in order to move them to a grow out tank. So, that they will grow up in a good pace.
Unfortunately, fish also die at some point. If I do know that it was because of old age or it's been attacked or got stuck between things, I'll get them out of the tank and will flush them. But if a healthy looking fish dies in a sudden and none of the above reasons apply, I will have a closer look in order to find out of what might have been the cause of death. So, I'll know wether to treat the tank they've died in.
Always get dead fish out if you don't trust it.
Note: How healthy and wellbalanced a fishtank may be, fish can still die without a clear reason. So, it has to be clear that this doesn't only happen in a fishtank with bad conditions.
Feeding my fish happens once or twice a day overhere. Not all livebearers (or even other kinds than just livebearers) need the same diet. I won't tell what food needs each specific species needs. But I can tell you that I do give all my fish a various diet.
Above and below: Overhere a nice combo of different kinds of nutricious fish food.
Above: Dried shrimps is a must for certain fish. All my carnivorous livebearers love them.
Below: Besides dried and frozen food, I also give them live food. For all carinoves and omnivores an important nutrient.
Above: White mosquito larvae.
Below: Blood worms.
You can also find live food outdoors, of course. Just be sure that no negative bacteria are in there that might cause problems with your fish. Many insects lay their eggs in the water. Try a pond, ditch or something similar. For sure it's a cheaper way of getting your hands on live food.