Description Nettex Calmer Maintenance Powder delivers high levels of Chelated Magnesium. This is readily absorbed through the intestine to maintain magnesium levels, giving long-lasting effectiveness. Nettex Calmer Maintenance Powder encourages wellbeing and concentration and can be fed to horses or ponies to help reduce stress related symptoms such as nervousness, excitability, apprehension and irritability. Made in the UK.