Sorry about it taking so long to respond back.

I have level 2 on everything, and have not yet had the algae.

I have 21 villagers, half working on tech the other half as farmers. All the farmers want to do is water the crop. The only way I can get them to harvest is to be playing when the crop comes in and drag them over to it each time.

Then, like others they want to go get the coconuts. They don't want to fish at all anymore, but I've not gotten any island event about having the algae. I've been waiting for it so I could cure it and finish out the farming.

So unless I am playing the won't fish, pick coconuts or farm because the food is always at or near 0.