Thanks for the welcome, Watermom!

Here are my details:

We are located in Southern ON, Canada. The pool is inground and a rounded, rectangular 40x20', approx. 125,000L or 32,000 gal(?) with a vinyl liner. It has a Hayward Superpump 0.75HP with only 1 speed seting. It is on a Hayward Pro Sand Filter with 53GPM capacity and also has a Hayward CL220 chlorine feeder, using 3" pucks.

Current readings on an Olympic drops test kit are: Br 2.0, Cl 1.0 and pH 7.2, although when we took a sample to the pool store, they said we had no chlorine in the water. I am probably going to order the Taylor 2006 kit today, as I just read about some of the other indicator on the forum (that was why I had not logged off lol).

Over the last 24 hours, we have added:

1 L of IPG Algi-pro 60 Algicide two times, approx. 12 hours apart
Shocked pool 3x with 1.5kg IPG Shock Plus Sanitizer.
Added 2kg of IPG Alkalinity plus sanitizer
Added 500g of Aquapro Pool Protect pH+

All of this on pool store recommendations (I am seriously considering buying shares in IPG BTW)

The algae bloom that we are fighting has dissipated somewhat and the sotre has told us to add another 2kg of stabilizer tonight, then flash again.

I should note that all of this happened after a great deal of rain and then a very hot spell, while the solar blanket was on. The algae itself is in the water, with a little yellow algae on the stairs and in the shadier parts of the pool .

Thanks so much for any help! Back to reading about BBB pools now (I am hoping the 3rd B does not mean bulldozer...)