The best tank mates for goldfish are cool-water, unswallowable and gentle. See safe picks for fancy and single-tail tanks, sample stocking plans, and the species to never add.
Looking for the best tank mates for flowerhorn cichlids? See which big fish can work, the tank sizes they need, an introduction plan, and the species to never add.
Find the best tank mates for Geophagus, from dither tetras and angelfish to plecos and Corydoras, plus stocking plans for 75, 125 and 180 gallons and the fish to avoid.
The best tank mates for severum cichlids, which fish to skip, and sample stocking plans for 55, 75 and 125 gallon tanks, with the size, temperament and water rules behind each pick.
Find the best tank mates for silver dollar fish, from cories and rainbowfish to calm cichlids, plus which species to avoid and how to handle live plants in a 75+ gallon tank.
Find the best tank mates for archerfish, sorted by salinity, size and water layer, plus the small fish, surface dwellers and puffers you should keep out of the tank.
Find the best tank mates for African butterfly fish: mid-water and bottom species that are safe, the surface fish and nippers to avoid, plus stocking plans for 30, 40 and 55 gallon tanks.
Find the best tank mates for rope fish, from angelfish and plecos to gouramis, plus which small, nippy or aggressive species to avoid and how to stock by tank size.
Find the best tank mates for knifefish by species, from black ghosts to clown knives, plus tank-size math, night-feeding tips and the fish you should never pair with them.
Find the best tank mates for datnoid, from arowanas and bichirs to silver dollars, plus the fish to avoid, tank-size math and stocking plans for 150 to 400+ gallon setups.
Find the best tank mates for gar, from silver dollars to bichirs, plus the fish to avoid, real tank sizes, the half-length rule and US state rules to check before buying.
Find the best tank mates for freshwater stingray setups: large, calm fish that stay off the sand and share soft, warm water, plus the plecos, nippers and cichlids to avoid.
