A comprehensive guide for first-time marine fish keepers covering tank selection, equipment, water quality, recommended species, and costs.
Marine fish keeping requires more equipment than freshwater. A minimum 60cm tank is recommended for water quality stability.
60-90cm recommended for beginners. Larger volume means more stable water. Overflow is ideal, but canister filters also work.
Canister filter or overflow system. A protein skimmer is nearly essential for marine tanks, removing organics via foam fractionation.
Fluorescent or LED is sufficient for fish-only tanks. Coral-spectrum LEDs are needed if you plan to keep corals too.
Marine fish prefer moderate flow. Use flow pumps for oxygen and circulation. Maintain 24-26C; a chiller is needed in summer.
Dissolve salt mix in dechlorinated tap water or RO water. Mix thoroughly in a bucket before adding to the tank. Check specific gravity with a refractometer.
Fish-only tank: 1.020-1.023. With corals: 1.024-1.026. Top off with RO water as evaporation raises salinity.
Ammonia and nitrite must be 0ppm. Nitrate should be below 20ppm. Test regularly with kits, especially during cycling.
Change 10-20% every two weeks. Prepare temperature and salinity-matched saltwater in advance.
Maintain 8.0-8.4. Some fluctuation between lights-on and lights-off is normal. Check KH if swings are large.
Keep 24-26C stable. Rapid changes cause ich. Match water temperature carefully during changes.
Popular thanks to the movie. Hardy and easy to keep. Enjoy the symbiosis with anemones. Captive-bred specimens are especially robust.
Small, vibrant blue-green fish. Extremely hardy and beautiful in schools. Perfect pilot fish.
Beautiful white and orange coloring with a distinctive tall dorsal fin. Peaceful and mixes well.
Vibrant yellow accent for your tank. Eats algae, helping control growth. Needs a larger tank as it grows.
Vivid blue and very hardy. Slightly aggressive, so choose tankmates carefully.
Silver with unique black spots. Peaceful and easy to keep, best in groups.
Monthly marine fish keeping costs typically run 5,000-15,000 yen. Adding corals will increase costs due to additives and lighting electricity.
Captive-bred fish are hardier and often accept prepared foods better. Especially recommended for clownfish.
Choose sellers who quarantine and treat fish after receiving them to prevent diseases like ich.
Temperature management and stress reduction are critical. Look for insulated packaging, oxygen, and seasonal temperature control.
Check reviews and choose sellers who handle post-arrival issues. Sellers offering care advice are a plus.
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