Coccidia

There is not much to "think" here. Corid is the only real treatment for coccidiosis, and therefore without alternative. I am not sure why you would mix all the medication with water at once (or did they give you that one gallon 9.6% jug right there?), but if that is what you did, I would refrigerate it (and if only, that 10 day old water is not a great thing either). In general, cooling never hurts.

Good luck []

I agree with the last post.
 
A couple things you should know though to get you through this and afterwards....
 
Coccidia is zoonotic (meaning you can catch it and most other animals can as well). It cannot be removed from a physical environment once it has been contracted. This part is complicated to explain but in a nutshell it means that it will always be in the environment but not necessarily infective to you or your dog. BLEACH AND BLEACH after your dog has recovered and now as well as preventative measures. Watch out for it every spring (this is when the shelters have big infestations of it). To become infective (sporulate) it takes less than a week in moist, warm conditions. So refrigerate your water!!! It affects the intestinal epithelium and most dogs and cats will develop intestinal tract infections as a result so watch out for that as well.
 
Coccidia is a really hard thing to go through with your pet. I wish you the best of luck!

Corid is not the only treatment.
Albon  (Sulfamidethoxin) is also a very effective, popular and widely used drug to treat coccidia. It is also cheaper then corid, especially the generic products. It comes in a tablet form which is easier to give (imo) as well as liquid and is given for 3-5 days.   There are also drugs like Baycox and Marquis which are not approved for dogs, but often used on dogs in a vaccine-like fashion to prevent infection. They are expensive, but well worth it if you are a breeder with a coccidia problem. An ounce of prevention is worth a pound of cure.
Healthy dogs usually develop a natural immunity to it at about 3-4 months so it doesn#%92t affect older dogs as much as it does young pups.
coccidia is one though bug, but it can be beaten.