L.K.
Hello R.,
My son is 4 months old and the dr. told me it's ok to put baby juice (ex. gerber)in his cereal. So I hope this helps you.
As far as the pool goes with the hot temp. it's probably getting an alge in the bottom. They sell 1 lb packets of super shock. You could just sprinkle a small amount of that in the pool. But I'd do it at night time when your done swimming for the day. As you shouldn't swim for several hours after placing it in the pool. We now have a big above ground pool but I use to do that when we just had a kiddie pool. I'm not sure how big your pool is but I'd just put a few table spoons of the shock in.
L.