Category

🐠 Saltwater & Marine

Quick Answer: Saltwater aquariums require more equipment, more stable parameters, and more experience than freshwater. Start with at least 30 gallons, allow 6–8 weeks for cycling, and begin with hardy species like ocellaris clownfish before advancing to more demanding fish.

Care guides for marine and reef aquarium fish — covering salinity, tank size, reef compatibility, diet, and acclimation for each species.

⭐ Beginner

Ocellaris Clownfish Care Guide

The most popular saltwater fish — peaceful, hardy, reef-safe, and available tank-raised. Full care for Amphiprion ocellaris including anemone compatibility.

💙 Tangs

Blue Tang Care Guide

Paracanthurus hepatus needs 100+ gallons, a heavy swimming load, and careful introduction. Everything about keeping "Dory" healthy in captivity.

💛 Angels

Coral Beauty Angelfish Care Guide

One of the smallest marine angelfish — relatively reef-safe with caution, and a good intermediate challenge for the growing saltwater keeper.

🌊 Wrasses

Cleaner Wrasse Care Guide

Fascinating parasite-removal behavior but a challenging captive feeder. The full truth about Labroides dimidiatus in home aquaria.

🐡 Cardinals

Banggai Cardinalfish Care Guide

Hardy, reef-safe, and fascinating mouthbrooders. Pterapogon kauderni is one of the most interesting and accessible marine fish for intermediate keepers.

🟡 Blennies

Bi-Color Blenny Care Guide

Personality-packed bottom dwellers that graze algae and entertain. Small, hardy, and reef-safe — an excellent addition to most reef tanks.

Frequently Asked Questions: Saltwater Fish

How much does it cost to start a saltwater aquarium?

A basic 30-gallon FOWLR (fish-only with live rock) setup runs $500–$1,000. A 55-gallon setup with proper filtration and lighting is typically $800–$1,500. Reef tanks with corals add significant cost for lighting and dosing equipment. Budget for ongoing salt mix, test kits, and premium foods.

What equipment do I need for saltwater?

Minimum: tank, stand, sump or HOB filter with protein skimmer, powerheads for flow, heater, refractometer, and live or dry rock. For reef tanks, add appropriate lighting (T5 or LED) and a two-part dosing system or kalkwasser for calcium/alkalinity maintenance.

Can I mix saltwater fish from different ocean regions?

Generally yes — most popular marine fish share similar water parameters (78–82°F, SG 1.024–1.026, pH 8.1–8.4). The bigger concerns are territorial behavior, aggression between similar-looking species, and compatibility with any corals in the tank.

How do I properly acclimate saltwater fish?

Float the bag for 15 minutes for temperature equalization, then drip-acclimate for 60–90 minutes (50–100 drips per minute) to slowly adjust salinity and pH. Never pour store water into your tank — it may introduce disease. Transfer fish with a net and discard the bag water.