Start with research, you can't go wrong with that
Words in bold is the most critical one. Many fishkeepers brought fishes that grow too large for their tanks, end up stunting them or giving them away to LFS or other people.
- What type of fish you want
- Tank size to house them for life
- Aggressiveness
- Possible tank mates
- Planted/Non-planted
- Food
- Type of filtration
- How dedicated are you to doing water changes and filter cleaning [Affect stock levels]
Words in bold is the most critical one. Many fishkeepers brought fishes that grow too large for their tanks, end up stunting them or giving them away to LFS or other people.