In the Limited Warranty for the Dolphin S50 it says "IT IS YOUR RESPONSIBILITY TO PROVE THAT THE PRODUCT WAS USED IN AN ENVIRONMENT WITH APPROPRIATE WATER CHEMISTRY." Ok, fine...no issues there. However, it then says "Chlorine: Under 4 PPM." Ok, now that's an issue for me. My CYA is currently 50 so I've been keeping my daily FC at 6-7ppm based on the FC/CYA Chart here on TFP to avoid another algae bloom. Do I really need to lower my FC to 4ppm anytime I use this new Dolphin robot cleaner?