We had a huge algae problem with our pool (grass-green water, algae growing on the walls, etc.), and water analysis at Leslie's indicated off the charts levels of Cyanuric Acid and Calcium Hardness. Obviously we were looking at a drain and refill situation so we have decided to attempt to manage the pool with the BBB method since everything is more readily available in our area.
We have a 20,000 gallon plaster pool, cartridge filter. Last night (tuesday night) we drained over 10,000 gallons out and have since refilled it.
I found the algae control thread (turning green pool into an oasis) and began using that method for the startup process. Of course, my new FAS test kit isn't here yet so I can't accurately tell my CYA levels now.
Since we began refilling it, we have added almost 30 gallons of 6% bleach into the pool over the last 24 hours, plus I used my last box of Chlor Brite shock from Leslie's (12 lbs of Sodium Hypochlorite powder basically). Every hour to hour and a half we're testing, and most of the time our FC is real close to 0 ppm, so we dump more in. I understand that this means that the FC levels are actively killing "stuff" in the pool water, and the 105 degree record heat and sunlight is not helping keep FC available in the water.
We have about 20 more gallons of bleach coming from Wal-Mart tonight, but I guess I'm just not sure if I'm on the right track here. The pool is definitely becoming clearer and is not green anymore, but at what point should I start seeing it beginning to hold FC levels?
PH is slightly low (6.7), Alkalinity is about 120-140. That's all I can check with my current kit (like I say, new one's on the way).