I pulled mine out to inspect it first then put it back in. I have to go get a replacement in a day or two. You can pull it out and look then just put it back in until you get a replacement. I would say its a sure thing you will need to replace it. But then again I figured you would have mineral...
Hopefully there are still replacement parts. The anode rod is fairly long and I believe can vary in length. Hopefully all will go smoothly for you. I had to use an Impact wrench to get mine broke free.
Just tried looking at the Apollo systems. Maybe you have a powered anode which does not need replacing but I'm not familiar with that system. I'm sure somebody on here has the same setup you do. Or maybe google your model # and see.
On top of your tank should be a 1 1/16 looking bolt head. Drain a little bit of water out then pull that out. That's the anode rod. If it's less than about 1/4 inch or so you need a new one. Rust attacks that instead of your tank. Unless your tank is glass lined in which case I have no...
I actually removed the spigot after I drained the water out. Then use a bucket instead of water hose. Flush with fill line and use your finger to keep drain hole open. Took a little while but eventually deposits quit coming out. Now I have to replace anode rod as mine is about a 1/16 of an inch...