Coldwater fish kept purely on scraps or a single treat food tend to miss the wider range of nutrients a proper diet is built to cover, which is the case for a dedicated complete flake over feeding whatever's easiest.

Aquarian describe this as a 100% balanced and complete diet for all coldwater fish, built from fish and fish derivatives, cereals, oils and fats, vegetables, fruit, yeasts and algae, with added antioxidants and vitamins C and E. It's meant to be fed up to twice a day, in an amount the fish will finish within five minutes.

• Sold as a complete diet for all coldwater fish, not goldfish alone
• Ingredients include fish and fish derivatives, cereals, vegetables, fruit, yeasts and algae
• Fortified with vitamin C, vitamin E and antioxidants
• Feed up to twice a day, only what's eaten within five minutes
• Sold across a small range of pack sizes

What's not on the card. No protein, fat or fibre percentage is supplied for this food — only the ingredient list and the manufacturer's claim that it's complete and balanced. If you want a specific analytical panel to compare against another food, this card doesn't carry one.

Who it's for: goldfish and other coldwater fish keepers who want a single flake food covering the full diet, rather than feeding treats or a single ingredient.