Hi all. I've had my silver cell running 8 days now and was wondering if it's time to change the dacron filter in the anode basket. I've got the voltage set at 3.5v and the amperage is about 1.6 amps. It's been in that range since I started. Just wondering if there is some signs to look for indicating a clogged filter. I've heard the amps will drop off when it's clogged up. Any tips would be appreciated.