I bought a 1998 Viking 2460 a couple of years ago and have been working through the systems, rebuilding side boards, etc., etc. I didn’t get out at all last year, but have several trips planned for this year. So, I made my way around to the Suburban 6 gallon water heater and started the maintenance. I got the old anode rod out. I’d say it was due for replacement. Then I started back flushing the tank. Along with a bunch of lime deposits, this came out. . Anyone know what this is? More importantly, is my hot water heater toast?