Four summers after having moved into a house with a pool, I've just decided that my husband and I will start taking ownership of the pool water care. Until now, we have used test strips and the "free" testing by the pool store. I know, I know, terrible practices! But we've been so busy with other things in life and have just decided it's time to tackle the pool water on our own. Except not on our own - because I found this awesome group! Both of us grew up with pools and had parents who tested their own water, so I'm not sure how we ended up using test strips and the pool store. Oh wait, I do know: convenience! Last week, I decided we need to step up our game and my online searches brought me here, thankfully. We have a 16' by 34' inground, DE filter, plaster pool that holds approx 21,000 gallons. We live in a wooded area and our family joke is that we notice a new "season" every week or two while our pool is open , and that season is whatever is falling from the trees on our property! I'm really looking forward to learning here. I ordered my TF-100 test kit, downloaded the Pool Math app, and have read a whole lot of articles. Thanks for making the site and making it so welcoming and easy to access!