I bought these in the form of little cubes in trays, 3.5 oz for about 4 bucks (Hikari brand). The brine shrimp were a little less, the daphnia a little more. It is a little cheaper to buy it in the form of flat slabs, but not as convenient.
That provides some perspective, thanks Roger. I've also been looking to see if there are any inexpensive tests for chloramine. I'd like to test the tap water to see how much chloramine removing product it takes to clear the chloramine out. There are instructions on the bottle, but different public water systems use different levels of additives.
Also, usually I don't add tap water to the fry pond. I add it to my larger pond, let the big filter take care of the ammonia, and then pump that pond water into the fry pond.
Matt