Thank you for your comment!
I think that an aquaponics system or hydroponics system would be best used by someone who doesn't have much space to grow food.
Gardening in the soil makes more sense for crops like potatoes or carrots, things that normally take a lot of space. Hydroponics works really well for plants that you eat the leaves like lettuce and spinach, and also works well for beans and peas.
Whiteflies are always difficult to deal with, but if you are doing hydroponics, there's no fish to worry about killing, so you can use a lot more things to spray them with.
With aquaponics, the nutrients depends on how many fish are in the water tank. The more fish you have, the more nutrients you have. I just didn't have enough fish in the tank this year.