With no stabilizer in the water, make sure that at least one of your bleach additions is happening in the evenings so that the bleach has the whole night to work on the "stuff" in your water without the sun degrading it.

Is the pressure on your filter rising? How often are you backwashing? How does your water look? Is it still blue/cloudy, or is it green still?

You should start seeing results soon, if you're able to consistently keep the chlorine level above 10.

Janet