Madeira dive conditions 8/26/12

[popolarbear]

I think you could get rough trends, but vis varries some years being good and others not. might be due to underground water table and surface run off paterns not anual cycles. on some lakes i suspect vis is affected by chemical pesticides in water table. those lower the daphinia concentrations and thus lower the lakes ability to remove green portion... square lake comes to mind. I know people will argue that vis on this lake droped due to introduction of trout. but i have trouble believing that soo many trout were introduced that this could have effect. instead i know some people involved in freshwater plankton, and they have seen masive swings in the populations. this was atributed to chemical spraying. and spraying some distance away. actualy for aphids in trees.regardless of how much you like clear water in some of these lakes, the spraying isnt going to stop. on tonka vis varies from bay to bay. and even from one side to the other of a bay. partialy due to wind currents. partialy due to boat trafic. water gets clear zones from the mussles and weeds. there are zones of clear water that are close to the mussles and weeds, but only with just the right direction and speed of wind curents. today we had about 8-10ft vis on lower good side of lake. and wind was strong...by the way muskies(and bass) are crawling in the shallows.....superior is same way. vis will go up and down with currents.