Atwood uses an Aluminum tank.
Atwood aluminum tanks do NOT require use of an anode rod of any type
Atwood has a 1/2" drain hole which is small and makes it harder to fully flush/rinse due to small drain hole (Suburban uses a 3/4" due to requirement to use an anode rod which is also 9" long)
A 1/4" pet c o c k drain further inhibits proper draining.
Atwood uses a NYLON drain plug due to drain bung threads being aluminum which can be damaged, galled, pitted and/or stripped when other types of plugs are used.
It's your WH and you can do whatever you want......your choice/your issues.
Just remember not everything sold in the aftermarket is needed, recommended or even an improvement.
Just a product being offered for sale.......to get your $$