Hi all. We recently acquired a 5000 gallon above-ground pool. We filled it up a few days ago and today I'm trying to get a handle on the chemicals. I've been googling a lot and feel like I have a pretty good idea of how to go about things, but I was hoping to get some advice from some real-life people.
I keep aquariums, and have some understanding of water chemistry... things like pH, buffers, etc. From what I'm reading I should be going for a pH of 7.2 or so, and a chlorine level of 2 ppm.
In all the reading I've done I haven't heard much mention of buffers or the role they play in pH. Our water is hard and contains a natural buffer, so I'm anticipating that the pH Minus I'm adding won't have much effect on pH until the buffer has been broken down. I was wondering if there are any general rules regarding buffers in typical hard water? Or is the best plan to just add x amount daily until you get your desired pH?
Our pool came with a test kit for pH and chlorine. I have aquarium test kits for pH and chlorine too... I'll probably use both and see how they compare. The kit that came with the pool mentioned that chlorine in the water would have a serious effect on the pH reading. Is that generally the case with pH tests, and if so, how can you get an accurate reading when there's pretty much always going to be chlorine in the water?
I added some chlorine to the pool this morning. I've noticed it's not dissolving very quickly. I thought that might be related the alkalinity of the water (out of the tap pH=7.8), so I added some pH Minus too. As soon as the chlorine dissolves I'm going to run some tests and see where that puts me. And of course I have the kids asking me when they can get in the pool every 5 minutes. I'm really nervous about letting them get in if there's any chance that there's undissolved chemicals in the water. Is there a basic rule as to how long you should wait before allowing people in the pool after adding chemicals?
Any advice would be greatly appreciated. Thanks in advance!
Gregg