I'm keeping my FC around 10 this summer due to CYA of 90. I already drained once to bring it down from 200+, so I'll wait to do it again. Is there a place where I can buy a comparator block that measures FC levels that high? I already have the TF-100 kit, but I'd rather not use the FAS/DPD test every day. I know I could dilute with tap water, but honestly, I'm looking to be a little bit lazier than that!