Equine America So-Kalm Paste 3 x 10ml. The Equine America So-Kalm Paste is is a magnesium and calcium supplement that can help calm nervous, excitable and stressed horses. Equine America So-Kalm Paste contains premium grade Magnesium with the essential amino acid L-Tryptophan to help calm and focus the horse. So-Kalm Paste encourages concentration, focus and willingness to work in horses without removing the 'sparkle' necessary for performance. For that big show or class, So-Kalm Paste is the ultimate in calming, for a relaxed and focused round. Read more… So-Kalm Paste syringe can be used alone or as an extra 'top up' to So-Kalm Powder. Administer 10ml per day into the horseâ€™s mouth, onto the back of the tongue, 1. 5 - 2 hours prior to exercise or event. Maximum per day 30ml.