I always use the powder from tsc. It's 20%. No matter which one you get, someone will be able to help you calculate the correct dosage. Most of them are already on here in some of the threads.
I am so sorry that you lost this little one...get the Corid and start treatment. Chickens, being prey animals, will not show signs/symptoms of illness until they are very sick. Start it now. Clean and disinfect everything.
It is so tough when they are so little and get sick :(
Once you see bloody poo, the coccidia is so bad that it is eating the lining of the intestine. I'm not sure that this is the problem, but it doesn't hurt to try. I would get the meds and treat the chicks. It won't hurt them and just...
Get Corid. Mix it into their water. You have nothing to lose at this point. For the weakest chick, use a dropper and dose her with the meds. Just give her about what you would think she would drink on her own at one sitting. Repeat dosing every 3 - 4 hours until she drinks on her own...