I have actually been using the data on this site for about a month, and decided I should register. While googling for pool advice, after acquiring my 30K gal inground pool, TFP would show up every time with the answers I needed. So far, everything I've learned has been spot on. I already purchased my K2006 test kit after learning about it here and found out my pool water has very high TA due to the fill water also having high TA. I will be building an aerator shortly to help take care of that problem. poolcalculator.com and pool school are great resources, so keep up the great work. I actually do not have any questions at the moment, but will be looking for an automatic cleaner at some point. I'm sure there are plenty of threads to look at already.