since it’s so hot, whats everybody using? I need a good one that replenishes elements that are lost through sweat, not one with just salt or sugar to make one drink. Any ideas?

I love smartpaks pelleted smartlyte electrolyte supplement. Only electrolyte they will eat in their grain.

E-Charge by Oxygen.  It has elctrolytes, amino acids and minerals.  Works great!

THE Equine Edge

Pure Himalayan Salt which produces significant positive effects on organs, respiration, circulation, connective tissue, nervous system functions and rapid hydration. It contains 82 macro minerals and trace elements essential to the body’s health and well-being, macro minerals which are needed in abundance such as calcium, chloride, iron, magnesium, phosphorus, potassium and sodium. This full spectrum electrolyte is everything your horse will need to stay hydrated and maintain its health. NO sugar.

I really like these. Originally developed for the ‘96 olympics and used a lot by endurance riders. They also have a feed thriugh powder but these tubes are very easy to keep around and use. I usually do 1/2 a tube after our run when it’s hot.

https://kppusa.com/product/summer-games-plus/

I always liked Dyna spark by dynamite. It's pretty inexpensive and horses took it in without a problem.  

FinishLine. No fillers.