There is only good fry and bad fry, nothing much to grade about.

It happens all the time that you won't get uniform size fish when you harvest.
The golden question is always about FCR. How many tons of feed spent yield you how many tons of harvest.
I only care about FCR.

Fry is a living thing, you can never get consistent quality fry all the time. Just like all your children will not look the same and grow at same height. So it's a but of luck. And of course hatchery integrity sometimes being questioned too.
I also can tell you that everyone has good and bad things to say about everyone in this business.

My preference will be Thong Tai in Simpang Pertang near Titi Negeri Sembilan.
I would usually go for 1.5inch to 2inch fry. Nothing smaller nor larger.
Price for fry can go from 5cent to 10cent. Depends. Sometimes by pressuring seller too much May made you end up with low quality fry.
Good quality fry is extremely important.