By Cerberus.Pukushu 2012-03-25 02:25:58
oh and this may be silly, but you can convert your other seals to KS if you have some type that you dont want. ex convert 3 BS for 1 KS. This is technically the fastest way.
Another way is to pay for a KS99 pop item. This is probably the second fastest way. Since you will be getting all the drops for your purchased pop, you can sell the pondweed to offset what you paid for the orb and in some cases make money.
If you insist on farming seals (which is totally fine) then the method Draylo outlined is the highest probability for seals to drop per 5 min and lowest manpower way.