200W Titanium Aquarium Heater System Reviews?

[One Reefing Boi]

Anyone have this system? Thoughts? Would you recommend it for a 50gal Waterbox AIO?

 

[Blue Ring Octopus]

Can you find the old BNIB Via Aqua Titanium Heaters with the manual knob controller with a separate thermostat that goes in the tank as well? I had a LFS had a bunch I was so excited I bought a few of them.
https://reefbuilders.com/2018/11/14/top-7-aquarium-heaters/ This is the newer style, I do not know if they are the same.

 

[One Reefing Boi]

Can you find the old BNIB Via Aqua Titanium Heaters with the manual knob controller with a separate thermostat that goes in the tank as well? I had a LFS had a bunch I was so excited I bought a few of them.
https://reefbuilders.com/2018/11/14/top-7-aquarium-heaters/ This is the newer style, I do not know if they are the same.

so this might be a dumb question.. but how do I actually read the article there? This is all I see

 

[Blue Ring Octopus]

https://www.marinedepot.com/viaaqua-titanium-heater This is the new style heater, mine has the manual knob.