Tropic Marin Immuvit activates the immune defence in fish and supplements food with essential B vitamins. Research studies have shown that the betaglucane contained in yeast naturally activates the immune system of fish and therefore stimulates the resistance of fish to diseases. The water-soluble B complex vitamins contained in yeast and spirulina ideally supplement every food. Vitamin B12 in spirulina arouses the feeding behaviour in fish. Furthermore, spirulina also contains asthaxanthin which improves the colour and fertility of fish.Tropic Marin Immuvit+ for a natural immune stimulant and as vitamin B supplement+ activates the immune system of fish with natural beta-glucan+ prevents from deficiency diseases+ natural astaxanthin promotes colors and fertility of fish+ strengthens appetite and vitality of the fish+ rich in vitamin B+ no risk of overdose