If you looked at the manual on this product you would see that removing the anode, flushing the tank, etc., is a monthly maintence item, not 6 months, not 1 year and certainy not 2 years. The good book also indicates the use of teflon tape.
Being a full timer you do the maintence, one of the responses is that full timers ignore the required service intervals, actually fulltimers are more apt to do the required services to their "home", unlike casual weekend users.
JimF, CWO, US Army Ret, 100% DAV
2011 Georgetown 378TS
2008 Dodge Caliber Toad