Was checking out the reports and noticed all the commments and concerns regarding the spraying on your lake. I have never fished on LZ since access it is private but have heard it was quite a productive body of water at one time.
I log quite a bit of time on the water fishing diffrent lakes in Indiana, Michigan and Wisconsin and all I can do is make you aware of my observations on lakes sprayed with Sonar. Paw Paw Lake has been sprayed heavily for the last 3 or 4 years - Used to be great lake with good populations of bass and northern. Water color was fairly clear with healthy lush weedline down to 15 feet. Now no weeds and very dingy dark water - Fish populations diminished along with the weeds.
A great fisherman and friend of mine discussed this issue in the past, he lives on a lake in Indiana same deal. Boaters chop up weeds with boats and homeowners get tired of raking off beach. They contact one of the aquatic herbecide companies and lake is according to them is inundated with invasive weed species so they will need to eradicate and start an ongoing program. Prior to spraying great bass lake - Afterwards decimated population - small bass only for at last 5 years. Strange thing is dead dish do not seem to float do not why.
I am not biologist do not profess to be one just thought I would share my experience and concerns - I have contacted both Michigan and Indiana DNR with my concerns because I have seen the damage done.
PS: Wait until you start seeing the fish with sores and skin lesions - Kind of like a chemical burns where the skin is dissolved and flesh is exposed.