The best tank mates for platy fish, from guppies and Corydoras to tetras and gouramis, plus species to avoid, sex ratios and stocking lists for 20 to 55 gallon tanks.
The best tank mates for molly fish, from platies and corys to danios, plus which species to avoid, stocking plans for 20–40 gallon tanks and why hard water matters most.
The best tank mates for Endler's livebearer: safe fish, shrimp and snails, conditional picks, species to avoid, and sample stocking plans for 10- and 20-gallon tanks.
Find the best tank mates for guppy tanks: fin-safe fish, snails and shrimp sorted by tank level and size, plus the nippers and big-mouthed species you should never add.
Find the best tank mates for white cloud mountain minnow, sorted by temperature overlap, plus stocking plans for 10, 20 and 29 gallons and the fish you should never add.
Find the best tank mates for zebra danio, from corydoras and rasboras to white clouds, plus which fish to avoid and ready-made stocking plans for 20 and 29 gallon tanks.
The best tank mates for celestial pearl danio are tiny, calm, cool-tolerant fish and shrimp. See our temperature-matched shortlist, stocking plans, and species to avoid.
The best tank mates for chili rasbora, from ember tetras and pygmy cories to cherry shrimp, plus which fish to avoid and stocking plans for 5, 10 and 20 gallon tanks.
The best tank mates for harlequin rasbora, sorted by tank size and water layer, with sample stocking plans, honest notes on borderline picks, and the species to avoid.
Find the best tank mates for serpae tetra: fast, short-finned fish that hold their own, stocking plans for 20 to 55 gallons, and the fin-nipping targets you should never add.
Find the best tank mates for Congo tetra: safe schoolers, bottom dwellers and centerpiece fish, the species to avoid, feeding tips and ready-made stocking lists for 30–75 gallon tanks.
Find the best tank mates for black skirt tetra, from Corydoras to rasboras, plus which fish to avoid, sample 20, 29 and 40 gallon lineups, and how to stop fin nipping.
