FISH HEALTH BOOSTER eSHa OPTIMA eSHa OPTIMA is a unique combination of plant extracts, trace elements, minerals and vitamins that are missing from your tap water. These ingredients help create the natural environment your fish deserve. eSHa OPTIMA strengthens and supports the immune system, boosts reproductive activity and colours and improves development and growth. Your fish will flourish! THAT'S NOT ALL PRODUCT FEATURES New dosage plan with even better results! Recommended to be used after illness / during recovery phase Can be used in combination with all other eSHa freshwater aquarium products Available in 20 / 180 / 500 / 1000 ml For use in freshwater aquariums 20 ml treats 2000 litres / 440 UK gallons / 530 US gallons