Does anyone have any good suggestions as of what is the best alga to feed rotifer's? I want one thats easy handle, and readily available.

i personally choose to do a combination of Nanno and T.Iso
remember that the Rotifers are best described as a deliver capsule, so whatever you feed them should be what you want to feed the target (what ever eats the rotifers)

for clown larvae, both nanno and iso are great, which is why i use these two