Quote Originally Posted by geneskaf

We have been unable to keep the chlorine level to register in the pool. Are we not putting enough in at a time or is our chemistry messing it up? We are at our wits end at what to do to clear up the water. We are vacuuming it every night and stirring it up in the morning to filter very small particles.

Help!!!!!

Thanks,
Kathy
When you have a very dirty or algae infested pool, it will consume chlorine like crazy. What you probably need to do is test and add more often. 3 times a day is acceptable, but more is better. Test and add what's needed. I'd steer clear of the powdered shock, especially with your 400 hardness, and just use bleach or liquid shock. Get your chlorine to 15 and add as needed to keep it there for a few days. You need a good test kit to monitor this.