Well I am not sure if this is algae or not. I did have an algae problem last week after returning from 3 days away and it seemed to clear up with algacide and vacuuming and a recharge of D.E. I say seemed to clear up because, while it was crystal clear, the pool smelled a little "off" like a Lake or something might.
Today I noticed it was not so crystal clear anymore and the smell was stronger and now there was some white frothy junk floating on the top in some spots. I shocked it, added a top up dose of BQ (i was at 30 PPM) and raised the PH a little and not an hour later this frothy junk has pretty much taken over the surface of the pool.
Not sure what to do from here. I have been skimming the froth off but it does not seem to make a difference.
Looks like soapy water to me