I'm sorry to be so blunt, but many here have tried to be nice about this and it's not sinking in. The truth is that it sounds like both you and your dad need to give up this hobby of torturing fish because neither of you knows what you're doing. You are not "fishkeeping", fishkeeping requires some effort on your part. You appear to be stocking a tank full of fish so you have something full of colorful "moving things" to feed and watch once in a while.
But you're simply too busy to be bothered with water testing, water changes, filter maintenance or even regular gravel cleaning. You don't seem to know what on Earth "water parameters" even means, yet you claim to be experienced at fishkeeping. Then you cite your dad's apparent inability to care for his own tank as your guide. You go on to make it sound like it's a special event just to do a water change. I'm actually shocked the fish are being fed, yet I suspect they are probably being over-fed or they are being fed the wrong foods as well, since you have NO CLUE what you're doing.
Please, for the sake of the fishes lives, rehome them all, store or sell the tank and just watch some tv in your little bit of spare time. Fishkeeping is not an "easy" novelty hobby that you can just ignore because it's not convenient for you. These are living animals and they deserve to be cared for properly by the people who choose to keep them. Your fish are not supposed to have any diseases if they are properly cared for. Since you seem very unwilling to listen to the good advice you've been given here, that you did ask for btw, your best course of action would be to quit this hobby for now. When you do have the time to spend on this time-demanding hobby, do some research online, get a good book or two about freshwater fish and how to properly set up a tank, maintain a tank, maintain water quality and care for the fish you choose. You would find the time to do this if you really do want to keep fish.
I have been keeping fish as pets since 1993. Before I ever started my first tank I began to build my own extensive home library of books on this hobby. I have books on many different subjects because I don't believe in jumping into a hobby like this blindly, I want what is best for the animals I will be taking care of. Over the years I have kept freshwater tanks, saltwater tanks and a large thriving reef tank. I succeeded in this hobby by seeking out the knowledge on how to do it. If you don't have the time right now to learn how to keep your fish happy and healthy, then you honestly don't need to have fish. It's that simple.
Best of luck to you and your fish.
But you're simply too busy to be bothered with water testing, water changes, filter maintenance or even regular gravel cleaning. You don't seem to know what on Earth "water parameters" even means, yet you claim to be experienced at fishkeeping. Then you cite your dad's apparent inability to care for his own tank as your guide. You go on to make it sound like it's a special event just to do a water change. I'm actually shocked the fish are being fed, yet I suspect they are probably being over-fed or they are being fed the wrong foods as well, since you have NO CLUE what you're doing.
Please, for the sake of the fishes lives, rehome them all, store or sell the tank and just watch some tv in your little bit of spare time. Fishkeeping is not an "easy" novelty hobby that you can just ignore because it's not convenient for you. These are living animals and they deserve to be cared for properly by the people who choose to keep them. Your fish are not supposed to have any diseases if they are properly cared for. Since you seem very unwilling to listen to the good advice you've been given here, that you did ask for btw, your best course of action would be to quit this hobby for now. When you do have the time to spend on this time-demanding hobby, do some research online, get a good book or two about freshwater fish and how to properly set up a tank, maintain a tank, maintain water quality and care for the fish you choose. You would find the time to do this if you really do want to keep fish.
I have been keeping fish as pets since 1993. Before I ever started my first tank I began to build my own extensive home library of books on this hobby. I have books on many different subjects because I don't believe in jumping into a hobby like this blindly, I want what is best for the animals I will be taking care of. Over the years I have kept freshwater tanks, saltwater tanks and a large thriving reef tank. I succeeded in this hobby by seeking out the knowledge on how to do it. If you don't have the time right now to learn how to keep your fish happy and healthy, then you honestly don't need to have fish. It's that simple.
Best of luck to you and your fish.