Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants Southern Naiad infestation

I just bought a piece of land with an 8-9 acre lake. The southern naid covers about half the lake some times growing up from 10+ feed deep. We applied cutrine plus twice per advice of previous owner wo had leftover chemical. the naiad disappeared along dam where it gets deep really quick but just gets thicker in the shallower areas. I decided to fertilize last week thinking that creating a bloom to the very clear lake would decrease sunlight penetration thus decreasing the naiad. We are planning to continue our fertilization regiment and add grass carp up to about 50. We do not want to entirely eliminate the naiad but want to create a healthy lake that can be fished without the headaches of the weeds on every cast.
How does this plan sound. Any other suggestions.