Black skirt tetra care made simple: the right tank size, group numbers, diet, water parameters for US tap water, and which tankmates to avoid so fin-nipping never starts.
Rummy-nose tetra care made simple: 20-gallon long tank, 75–82°F soft water, a school of 8–12, easy diet and peaceful tankmates, plus what a fading red nose is telling you.
Our ember tetra care guide covers tank size, group size, water parameters, diet, tank mates and breeding, with stocking plans for 10 and 20 gallon planted tanks.
Cardinal tetra care made clear: 20-gallon tank, groups of 8+, 76–82°F soft acidic water, micro foods, safe tankmates and how to get new fish through the fragile first month.
A practical neon tetra care guide covering tank size, school size, water parameters in °F and pH, diet, tank mates, disease signs and a 20-gallon starter plan.
A numbers-first betta fish care guide: the right tank size, heater wattage, water parameters, feeding amounts, safe tankmates and how to read your betta's temperament.
Find the best tank mates for African dwarf frog setups: safe fish, snails and shrimp, species to avoid, stocking plans for 10 and 20 gallons, and a feeding routine that keeps frogs fed.
Looking for the best tank mates for axolotl? See which cool-water fish and snails can work, which species to avoid, and the tank setup that keeps everyone safe.
The best tank mates for koi are single-tail goldfish, golden orfe, tench and a few others. See our US compatibility table, sizing rules, and the species to keep out of your pond.
Find the best tank mates for oranda goldfish, from other fancies and white clouds to dojo loaches, plus the tropicals, fin-nippers and fast goldfish you should never add.
Find the best tank mates for ranchu goldfish, from lionheads to bristlenose plecos, plus the fast, nippy and tropical species to keep out and a 55-gallon stocking plan.
The best tank mates for fancy goldfish, ranked honestly: safe cool-water companions, conditional maybes, species to avoid, plus tank size, temperature and quarantine tips.
