From everything I've read, I need to order the TF-100 Test kit. Does anyone have a recommendation on best place to order? The only site I found that clarifies for sure that it's the TF-100 kits that I'm ordering is poolsupplyworld and it says that it ships in 2-3 weeks! What?! I need it now! Amazon was confusing and I found this one (TFTestkits.net) but wasn't sure if it was the correct item?? Also, I hope I'm posting this in the correct place. I'm new here! Thanks in advance for your help!