What are the pros and cons of an all-in-one aquarium kit versus a tank-only setup?
All-in-one kits bundle a tank with basic filtration and lighting, which simplifies setup and helps you get started faster. The tradeoff is flexibility. The included gear is usually sized for light to moderate loads and you may outgrow it, while a tank-only route lets you pair the aquarium with exactly the filter, heater, and light your plan needs.
Do tank dimensions matter as much as gallon size?
Yes, footprint and height change how a tank functions day to day. Longer, wider tanks offer more swimming room and surface area, plus easier access for aquascaping and cleaning, while very tall or narrow shapes can be harder to light evenly and to take care of.