I typed my previous post while your last one was waiting to be modded in, which is why they're in reverse order. Anyway.......

It's good that you're seeing some improvement. You may need to add some more of the metal out until the water starts clearing. In the meantime, keep your chlorine at the 2-4 range, your pH on the low side, and keep changing your filter as needed. (You're right, add some more bleach!)

You don't need to test for CYA again until about 4-5 days after you've added stabilizer. You can get it at WalMart in a 4 lb container. I don't remember if it's labeled "balancer", "conditioner", or "stabilizer", but the important thing is the active ingredient is cyanuric or isocyanuric acid. Follow the label directions for the amount to take your pool to the 40 ppm target, but then only add about 1/2 that amount, because it's much easier to add more later to get to your target than it is to have to drain/refill water if you overshoot. Because you're having to constantly change your filter, I would add it by putting it into an old sock or knee hi hose and hanging it in front of a return. It dissolves slowly, so don't add more or retest for it for about 4-5 days after you add it. The stabilizer will protect your chlorine from sunlight, so that it can be more effective against stuff in your pool. You should be adding chlorine a couple of times a day to keep a chlorine residual in the pool--once the stabilizer is in the water, then you won't have to add it as often.

Janet