CSS revisited

So I took another stab at formatting CSS with the page we got for homework.
It went a lot better than last week. I rearranged tags and what not so that it would be easier for me to work with. I had a lot of trouble with header and the footer before, but after placing them in order, then it was easier.
everything was going hunky dory, up until I tried using floats. I have used them before, and the worked. But for some reason I couldn't get the two divs to sit right. I even encased them in another div, but it this didn't work either. So to make my life easier, I got rid of the floats, and got rid of the table that didn't have anything.

I had a TON of validation errors. It had to do with the the tags ul and li
When I corrected them it, was mainly having to do where ending tags were.
The validation site was a bit irritating, since it gives an "explanation" on what is wrong, but doesn't necessarily tell you how to fix it, grrrr.
So I was off to hunt the answer down.


On a fun side note, my fish tank is having a algae bloom. It seems like no matter how many water changes I do, the tank doesn't want to clear up. I really don't feel like using chemicals... too many chemicals cannot be good for my poor fishy.