Will probably not make much difference in clarity. There are other ways to deal with algae if needed. Where is your pond generally ? You may read here that tilapia will work on algae but they are not allowed in MS without a permit.

BG are generalist feeders (eat many things) and will eat natural foods at the same time as pellets. That is also what is best for them - not all pellets but enough to supplement natural sources but add to growth and condition.

Pelleted food comes in many forms from very small fry powder which is for just hatched fish to big pellets. Feed them the right size food for the situation. See this for example.

http://aquamax.purinamills.com/aquamaxproductlist.pdf