The best replacement for cardinal tetras is neon tetras.

The best alternatives to cardinal tetras are rated as following:
★★★★★  neon tetras

Your alternative for cardinal tetras is not listed? Suggest!
Speaking about cardinal tetras, one probably shouldn't forget about angelfish.

Other search terms related to cardinal tetras and their ratings are:
★★★★★ angelfish
You have in mind a companion for cardinal tetras and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of cardinal tetras in all years. Click on graph for more.
cardinal tetras
neon tetras