Marine Fish Buying Guide
Marine fish are considered more challenging than freshwater fish, but with the right species selection, beginners can enjoy them too. This guide covers what you need to know before purchasing marine fish.
💰Price Range
Clownfish $15-$30, Firefish $10-$20, Angelfish $30-$200
View detailed price data →Recommended for Beginners
Buying Tips
Cycle your tank first
Don't add fish until bacteria are established — wait at least 2-4 weeks.
Check compatibility
Some species are territorial. Research compatibility before mixing.
A hydrometer is essential
Check saltwater salinity (specific gravity 1.023-1.025) daily.
Prevent disease
Consider a UV sterilizer and quarantine tank for ich prevention.
Useful Tools
💧 Aquarium Volume Calculator
Calculate water volume, weight, and heater wattage from tank dimensions
🧪 Water Quality Checker
Find compatible fish, shrimp, plants & corals based on pH, temperature & hardness
🍽️ Feeding Guide
Check feeding frequency, portion sizes & supplements by species and growth stage
🤝 Compatibility Checker
Check compatibility between two species on a 5-level scale
📊 Fish Compatibility Matrix
Check fish compatibility at a glance with our matrix chart
🔄 Nitrogen Cycle Guide
Auto-calculate bacteria colonization timeline for new tank cycling
🗓️ Seasonal Care Calendar
Monthly care events and seasonal management tips at a glance
🚿 Water Change Calculator
Auto-calculate optimal water change frequency and volume by tank size and fish count
🐠 Stocking Calculator
Calculate max fish capacity for your tank size with overstocking alerts
🏞️ Tank Layout Planner
Get substrate, plant & hardscape suggestions based on tank size and style
🧮 Care Cost Simulator
Estimate initial, monthly & annual costs by category, care level and quantity
⚖️ Species Comparison Tool
Compare two species side by side: care difficulty, size, lifespan & temperature
🎯 Pet Match Diagnostic
Answer 7 questions to find your top 3 perfect pets
🚚 Transport Safety Checker
Check transport safety score and precautions by category, season, method and distance
⏱️ Quarantine & Acclimation Timer
Manage quarantine periods and acclimation steps with countdown timers. Includes recommended durations by species
Related Content
If you have questions about care, you can ask experienced keepers and breeders on the Care Q&A Board. If you notice health issues, try the Find by symptom.