Common clownfish

So, you want to set up a marine tank? It's an exciting prospect and we're sure you're keen to dive right in and purchase your first fish. But before you do, we advise that you take the time to learn what the best saltwater starter fish species are for your tank.

Keeping saltwater fish is an incredibly interesting hobby and we're sure you'll be amazed by the graceful nature of marine life. But it's easy to get ahead of yourself and choose species that look good but aren't necessarily the easiest to look after.


How many marine fish in an aquarium?

If you've gone to the trouble of buying all the right equipment and setting up your very own saltwater aquarium, you're probably keen to adopt lots and lots of fish. Most marine aquatics enthusiasts want their tanks to be as lively and as colourful as possible!

However, it's important not too put too many fish in one tank. An overcrowded aquarium is likely to have a lot of problems, including:

  • Dangerously high ammonia and nitrate levels
  • Insufficient oxygen
  • Stunted fish growth
  • High risk of stress and disease
  • Fish behaving aggressively towards one another


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