A community tank of small tropical fish often has a real spread of mouth sizes in the same water, and a microgranule rather than a standard granule is built with the smaller end of that range in mind.

Fluval build this one around Black Soldier Fly Larvae, at up to 38% the largest single ingredient — a higher proportion than their goldfish formula — with whole salmon added for omega 3 and 6. It's a slow-sinking microgranule, sized 1.4-2.0mm, fortified with vitamins, amino acids and minerals, and processed in small batches in Canada with no artificial fillers, colours or preservatives.

• Up to 38% Black Soldier Fly Larvae, the largest single ingredient
• Whole salmon added for omega 3 and 6
• Slow-sinking microgranule, 1.4-2.0mm
• No artificial fillers, colours or preservatives
• Made in Canada
• 45g pack

What the label does not say. As with the rest of this range, Fluval quantify the insect content but give no protein, fat, fibre or ash percentage on this card, and there's no feeding amount or frequency stated.

Who it's for: keepers of a small tropical community tank who want an insect-based microgranule sized for smaller fish, rather than a standard-sized granule or flake.