Can Hydroton cause a PH to rise from 5.8 to 6.4 in a 10 hour period? How do you properly clean Hydroton? I have mine soaking in a bucket of warm 5.8 water...I'm using Distilled water, GH Nova, have a PH and TDS meter, Up and Down. Trying to dial my system in before use and dealing with a quick rising ph, any help will be appreciated...