Due to the number of discus i have the vet let me i purchase 2 bottles of it with 250 tablets per bottle. Cost me almost $500 though for the 2 bottles but was much cheeper than purchasing them in the smaller 21 tablet batches.
Wow a friend got me a 250 tab bottle of 200mg metro from the vet for $60-65. I know the 21 tab 400mg perscription metro was only $7 or something.
I usually up the temp above 30C when using metro. I would try some live mosquito larve or clean live blackworms to get them eating something again.